Geoff Taylor’s Penmaenpool model railway is a superb example of architectural and scenic modelling, based on a real location in North Wales. The layout captures a segment of the former Ruabon to Barmouth line as it appeared during the twilight years of steam, from the late 1940s through to the line’s closure in 1965. Although Penmaenpool was only one part of a much larger layout, it was presented as a standalone scenic section that is both operationally engaging and visually exceptional. After moving to mid Wales, he gained the workshop space to embark on a major personal project: a 4mm scale rendition of the former Cambrian lines along the Afon Mawddach. Geoff has since sold the layout, but it remains in existence and continues its life under new ownership. The model is based on the real station at Penmaenpool, Gwynedd, on the River Mawddach.
The real Penmaenpool station stood beside the River Mawddach, not far from Dolgelley (the name used in the period modelled; the town is now officially known as Dolgellau), and formed part of a route built in stages by the Cambrian Railways. The section modelled by Geoff includes scenery leading towards Barmouth Junction and Dolgelley, with the immediate area around Penmaenpool recreated in fine detail. This was a picturesque stretch of railway, with the line running close to the water, often on embankments and bridges, overlooked by steep wooded hillsides. The route was largely single track, except at stations such as Penmaenpool, which had two platforms and a passing loop. Geoff’s interest was sparked by the station plans in C. C. Green’s The Coast Lines of the Cambrian Railways, Volume 2 (Wild Swan), and although he initially considered modelling Penhelig, the extra space available after moving to Wales allowed him to combine Penmaenpool with Barmouth Junction, Dolgelley goods yard, and connecting scenic sections. The need to strengthen bridges and embankments beside the water contributed to the line’s earlier-than-planned closure. The station itself closed in early 1965, not long after management of the line had passed from BR’s Western Region to the London Midland Region in 1963.
Design
Unlike many layouts, which are freelanced or selectively inspired by real places, Penmaenpool is a model of an actual station, with minimal compromise. It occupies a footprint of 15 feet by 2 feet 6 inches and is built to 4mm:1ft scale using 16.5mm gauge track (OO gauge). Although the plan was compressed slightly to fit the available space, care was taken to ensure the layout remains clearly recognisable as the real location. Geoff consciously chose to model a specific place with historical accuracy, making this his first layout to fully represent a real station without invented additions. Penmaenpool appealed because the railway ran along a stone embankment with wooden platforms, the station building sat apart from the platforms, a tidal river filled the foreground, and the George III Hotel stood so close to the line you could almost touch the trains. He chose to model the entire BR period up to closure to allow greater variety in locomotives and coaching stock, rather than fixing the layout rigidly to a single year. A practical advantage of modelling this rural stretch was that comparatively few structures were required. Geoff has noted that an urban scene would have been far more demanding and might never have been finished alongside commissioned work.
The baseboards for Penmaenpool were the last to be constructed and differ from those used on the rest of his layout. They are built from good-quality 9mm plywood, using a two-layer construction with extensive cut-outs to reduce weight. This design was chosen to accommodate the raised trackbed, which runs on an embankment for most of the layout’s length, and provides both strength and rigidity without unnecessary bulk.
The layout is end-to-end and forms part of a longer sequence that includes Barmouth Junction, Dolgelley goods yard, and connecting scenic sections. The sequence of train movements follows a pre-programmed operating timetable drawn from period working timetables, supplemented with additional moves to provide interest. Each train typically appears only once in each direction within a full six-hour operating session. A short two-coach shuttle works back and forth between Barmouth and Dolgelley a few times a day; all other trains are seen once out and once back in a six-hour cycle. Light engines frequently turn on the loop at Barmouth Junction, a characteristic Cambrian practice that Geoff has deliberately replicated in his operating sequence.
Trackwork and Control
The layout is operated using Digital Command Control (DCC). Power bus wires, taken from mains cable, were either glued or pinned along the sides or beneath the gradients. As each piece of track was laid, individual droppers were soldered directly to the bus wires. This avoided any reliance on fishplates for electrical continuity and has proved extremely reliable. Despite years of regular operation, not a single section has failed, which is fortunate given the difficulty of accessing some of the wiring for repairs. Locomotive control uses DCC with Lenz equipment, and the control panel includes push buttons for operating the uncoupling magnets used with Sprat & Winkle-fitted goods stock.
All points in the scenic sections were handbuilt by Geoff’s friend John Bailey using Templot-generated templates. John passed away in 2015, and his high-quality pointwork remains a key part of the layout. On the Penmaenpool section, Geoff constructed the plain track himself using individual rail lengths, C&L plastic chairs, and plywood sleepers. This was Geoff’s first attempt at constructing plain track using individual chairs. Although slow and sometimes frustrating, the result was worth the effort. Early mistakes, such as fitting chairs the wrong way round, were quickly corrected as experience grew. Elsewhere on the layout, including Barmouth Junction and Dolgelley yard, SMP plain track is used, with the webbing removed for a finer appearance. Away from the scenic sections, Peco Code 75 track is used for both points and plain track, including the three storage yards. Ballast on the scenic sections is Woodland Scenics stone, brushed in place, misted with water and a little washing-up liquid, then fixed with dilute PVA; it was later toned down with a very thin matt black wash to represent oil staining.
The control system uses Tortoise slow-action point motors and servos, but Penmaenpool presented a challenge. Since Ruabon yard is directly underneath, nothing could be mounted beneath the baseboard. All wiring from points and signals had to be fixed on top of the board and routed to the rear, where it connects to the motors and servos. The hillside above the layout was deliberately designed to conceal these motors and wiring; it is built in seven removable scenic sections, one of which must be lifted first to access the others. MDF boxes were used to form the hillside, infilled with insulation board and finished with Woodland Scenics ground cover.
The control panel was designed on a computer and printed onto plastic-coated metal. It uses toggle switches rather than a mechanical lever frame, as the panel’s location makes it vulnerable. Point positions are shown using indicator LEDs. The panel is wired with a connector so it can be removed if necessary. Signals and ground signals are operated by servos controlled from this panel.
Scenery and River Modelling
Geoff, a professional architectural modelmaker, applies the same care and precision to his scenic work as he does to his buildings. His approach follows a consistent sequence: track is laid, wired, and tested before being painted and ballasted, then the platforms and backscenes are added. From there, scenic work begins at the rear and moves forward in layers, gradually building up the landscape.
The terrain was formed using a range of materials, including polystyrene for higher ground and card over formers for lower areas. Texture came from a mixture of hanging basket liner, carpet underlay, horsehair, teddy bear fur, and scenic flocks. These surfaces are coloured with thinned acrylics or sprayed with adhesive before the application of scatter materials. The embankments and contours are blended using earth powders and foliage products, mostly from Scale Model Scenery, WWScenics, and Woodland Scenics. Rock faces were built up with thick layers of builder’s plaster over carved polystyrene, then shaped with chisels, dentist’s probes, and screwdrivers. Once dry, the rocks were painted with a thin black wash to bring out crevices, then coloured based on photographs of the area and blended into the surrounding scenery. The stone embankment itself was formed from thick card coated in plaster; when dry, individual stones were scribed with an empty ballpoint pen and tinted with thin enamel washes.
Tree construction used Seafoam armatures sprayed in a brown-grey mix. Once dry, they were coated in hairspray and treated with fine scatter to create convincing foliage. These trees were concentrated around the riverbank and hillside areas to match the real location. Geoff chose this method for speed, having realised how many trees would be required. Other parts of the layout used ‘Forest in a Box’ armatures treated in a similar way.
The backscene at Penmaenpool was one of the few on the layout that Geoff painted himself. The backscene was painted to match the mountainous surroundings and blends well with the foreground scenery, helping the join disappear from most viewing angles. The station lamps were produced by Alan Buttler of Modelu, adding another layer of realism to the scene.
The River Mawddach, a key scenic feature, was modelled using a clear acrylic sheet rather than varnish. The riverbed was first painted matt black, then browns and dark greens, before being covered with PVA and very fine sand, weathering powders, and pieces of slate. A timber former was installed to support the acrylic at the desired water level, with the riverbed sloping up to meet it. The underside of the acrylic was then painted with thin washes of blue, grey, green, and brown acrylics, followed by matt and satin varnish; the top was very lightly varnished as well. The sheet was glued in place with PVA and weighted down. The banks were then completed with insulation board, sand, slate, and powders so that they appear to continue seamlessly beneath the water. This was the first time Geoff had tried this method, and he was pleasantly surprised by the result. The muddy margins were finished with torn insulation board, painted and blended with scatter to suggest soft, waterlogged ground.
Buildings and Architectural Features
All structures on the layout were scratchbuilt using a mix of techniques and materials. Many were drawn digitally and laser-cut using Geoff’s own equipment, while others were built using more traditional plasticard and overlay methods. Buildings were added late in the construction process to avoid damage during earlier scenic and electrical work. The laser cutter proved invaluable for producing the components of the platforms and the huts on the bridge, allowing precise and repeatable detailing. Geoff had spent more than twenty years working mainly in plastic and cutting apertures by hand, but adopted laser cutting to speed repetitive work and keep momentum on a large, multi-section layout while still fulfilling commissions.
The station building at Penmaenpool is a distinctive structure, located across a road and siding from the platform rather than directly on it. To reach the Up platform, passengers crossed both the tracks and a small road; to reach the Down platform, they crossed the road and then a siding. It was built from plastic sheet with Slater’s brick overlays, etched brass windows, and rendered sections created by applying talcum powder to wet paint. This gave a convincingly weathered and textured finish. The building includes differently coloured brickwork, a single-storey office with a canopy, a gabled house attached, rendered walls, and an enclosed rear yard with a high wall. Geoff notes the prototype’s mix of materials and forms, including different coloured brickwork, rendered sections, and a gabled house element attached to the offices, all of which contribute to the building’s “unusual” character for such a small station.
By the time Geoff began constructing later elements of the layout, he had acquired a laser cutter. This allowed for more precise and consistent fabrication of parts such as the signal box, platform supports, small huts, and the timber toll bridge. These laser-cut structures are made from MDF or thin plywood and include details such as pre-cut holes for brass fencing rods. The platform decking was laid plank by plank for an authentic timber appearance. Signboards and noticeboards were also computer-designed and printed to scale. The concrete platform supports were designed as single cut pieces with the railing holes included, saving many hours of repetitive measuring and drilling.
One of the most prominent scenic features is the George III Hotel, which sits hard against the railway with the main road behind it at roof level. This was built from DAS modelling clay over a plasticard core, with etched brass windows and railings custom-drawn and fabricated by Geoff. The unusual topography of the site was carefully modelled to reflect the prototype’s steep surroundings. A small 4mm scale figure of Geoff himself can be found standing on the balcony of the George III Hotel, watching over the railway. A riverside jetty in front of the track was included to represent where guests once boarded boats for Barmouth.
Other buildings on the layout include a two-road locomotive shed, crew facilities, and a small goods shed. The timber toll bridge near the station was built in layered MDF and plywood, with additional outbuildings and etched brass gates completing the scene. The bridge deck and supports were built up from different thicknesses of ply and MDF, with the main hut and small toll hut also produced from laser-cut parts. Geoff chose to model the gates open, improving eye-level sightlines across the bridge.
All signals, including tall semaphores and ground signals, were hand-built by Geoff’s friend Tony Geary. These are fully operational and powered by servos, which are controlled from the main panel.
Rolling Stock and Operation
Although Geoff does not build locomotives or rolling stock himself, the layout is populated with carefully chosen and detailed models that reflect the real traffic seen between 1948 and 1965. Because Penmaenpool and the surrounding sections represent actual locations, Geoff only includes locomotive classes known to have worked the Cambrian lines during the British Railways period. This approach keeps the operating roster both authentic and historically grounded. Some locomotives were limited to hauling three-coach trains due to the gradients, which was prototypical for Cambrian workings rather than a modelling compromise.
The largest locomotives regularly seen are BR ‘4MT’ 4-6-0s and GWR ‘Manor’ class engines. These are supported by a broad selection of smaller classes including GWR ‘43XX’ 2-6-0s, ‘2251’ 0-6-0s, ‘58XX’ 0-4-2Ts, ‘74XX’ 0-6-0PT panniers, ‘Small Prairie’ 2-6-2Ts, ‘Dukedogs’, and ‘Dean Goods’. Standard BR classes such as the ‘2MT’ 2-6-0 and 2-6-2T, ‘3MT’ 2-6-2T, and ‘4MT’ 2-6-0 are also represented, along with Ivatt ‘2MTs’ in both tender and tank versions. Diesel Multiple Units occasionally appear, particularly for summer Saturday excursions, including one unit type known to have worked from the Potteries.
Most locomotives and coaches are RTR Bachmann, with some Hornby models, plus a kit-built Dukedog by Jonathan Matthews. Geoff chose Penmaenpool only after confirming that Bachmann and Hornby could supply most of the necessary stock; over time even more suitable RTR items have become available. The only locomotive Geoff has ever built himself was an LMS ‘Mogul’, which never ran well and discouraged him from building more.
Some locomotives are sound-fitted, and most have added crew figures, weathering, and lamps. Certain engines are limited to three-coach trains on the gradients, which mirrors the prototype rather than being a compromise.
The coaching stock includes ex-GWR Collett and Hawksworth coaches as well as BR Mk I vehicles. Liveries range from carmine and cream to maroon and chocolate and cream. Sets are typically fixed together using Bachmann bar couplers in NEM sockets, with Kadees fitted at each end of the rake to allow easy uncoupling at the storage yards. Older coaches without NEM sockets use Kadees throughout.
Goods trains are fitted with Sprat & Winkle couplings and are uncoupled using track-mounted electromagnets activated by push buttons on the control panels. These systems are reliable and allow realistic shunting without the need for manual intervention.
A screen-based system drives the train sequence, allowing operators to follow a structured timetable without revealing upcoming moves in advance. The pages are changed on a laptop. This system, devised with John Elliott after seeing his Bradfield Gloucester Square layout, replaced an earlier card system that occasionally led to incorrect moves. Geoff has added clock hours to the sequence so that trains do not repeat within a session.
A Collaborative Achievement
To complete the presentation, Geoff installed a comprehensive lighting system across the scenic sections, ensuring the layout is evenly and effectively lit. Pelmets were added to eliminate glare from overhead fluorescents, and drapes were fitted beneath the baseboards to conceal tools, storage, and other visual distractions. These finishing touches help maintain a clean, professional appearance, especially during exhibitions. Geoff prefers a brightly lit layout and has used extensive lighting along the scenic sections to keep the modelling clear and evenly presented.
The layout has been over ten years in the making, and Geoff is quick to credit the friends who have supported him throughout. Foremost among them is the late John Bailey, who played a central role in the early stages of the project. John was responsible for wiring, pointwork, and track construction, and also helped with building the baseboards. His craftsmanship and friendship are deeply embedded in the layout. Tony Geary’s contribution is equally significant. He built the fully operational semaphore and ground signals and helped ensure the smooth running of stock, both of which are critical to the layout’s character and performance. Geoff notes that several elements would have taken far longer without this help, and that the operational complexity ultimately exceeded what he first envisaged, but has proved hugely enjoyable in group running sessions.
Although Penmaenpool is just one section of a much larger modelling project, it stands alone as a complete and atmospheric layout in its own right. With its meticulous scenic treatment, finely detailed architecture, and prototypical operation, it sets a clear benchmark for modelling real locations in 4mm scale. More than that, it represents years of careful work, shared knowledge, and lasting friendships; a true collaborative achievement.
More Information
- Taylor, Geoff. “Penmaenpool.” British Railway Modelling, July 2016, pp. 26–36.
- Taylor, Geoff. “Buildings for Penmaenpool.” British Railway Modelling, August 2016, pp. 58–63.
- Taylor, Geoff. “Passage to Penmaenpool.” Railway Modeller, vol. 68, no. 806, December 2017, pp. 1004-1009.
- Taylor, Geoff. “Barmouth Junction.” Hornby Magazine, no. 144, June 2019, pp. 18-25.
- Taylor, Geoff. “Barmouth Junction, Part 2.” Hornby Magazine, no. 145, July 2019, pp. 56-63.
Epilogue
Penmaenpool is more than a model of a station on the Mawddach; it is a distillation of place, memory, and craft. By choosing to model a real location with such fidelity, Geoff Taylor has shown how architecture, landscape, and railway operation can be woven into a coherent whole. The result is not simply an echo of the Cambrian line, but a lasting tribute to it. In its quiet way, Penmaenpool demonstrates that accuracy and artistry can live side by side, and that a layout can honour both the real railway and the friendships that made its modelling possible. It is a scene that, like the tidal river beneath it, continues to leave a lasting impression long after the trains have passed.