Tyndrum Upper Station

Tyndrum Upper Station is a single-storey island platform station building designed by James Miller in 1893-4 for the West Highland Railway. The rectangular plan building features a distinctive swept bell-cast roof with canopies extending over both elevations, reflecting the Swiss Chalet style adopted across the line to complement the mountainous landscape.

The station is constructed with a timber frame clad in scalloped timber shingles and sits on a brick plinth with a painted base course. The façade includes panelled angle pilasters, glazed end screens to the outer left and right bays, and timber panel doors with 3-light fanlights. The windows are bipartite and canted, originally with small-pane glazing. The roof is finished with graded grey slates and terracotta ridge tiles, while rendered stacks with red clay cans rise from the building. Cast-iron rainwater goods complete the external detailing. The swept eaves extend on carved consoles to form the protective canopy.

Access to the station is via an underpass to the north, constructed with bull-faced sandstone retaining walls finished with moulded copes and entered through 2-leaf cast-iron gates with concrete steps.

A former North British Railway Company Type 6a signal box stands at the south end of the station on the platform. Built in 1894 (though one reference dates it to 1984, likely a transcription error), this 3-bay square-plan structure features a piended roof, a painted ashlar plinth, and a brick base with rounded brick corbels beneath projecting sills. The upper section comprises glazed timber-framed panels with fixed 9-pane windows to the south, east and west elevations. Deep bracketed eaves and a slate roof complete the design. The signal box exemplifies the Type 6a design modified specifically for West Highland Railway platforms and maintains stylistic consistency with the main station building.

Tyndrum Upper is one of a significant series of single-storey island stations designed for the West Highland Railway in the 1890s. The distinctive Swiss Chalet aesthetic was deliberately chosen to harmonize with the mountainous scenery along the route. Though James Miller is attributed with the design, Robert Wemyss may have contributed while working with architect J.J. Burnet. Miller brought considerable railway station experience from his previous work as an assistant in the architectural office of the Caledonian Railway.

The West Highland Railway ran between Craigendoran and Fort William and opened in 1894. The island platform arrangement, with track either side of a central platform reservation, was introduced by Charles De Neuville Forman, the railway's engineer. This engineering solution distinguished Tyndrum Upper from conventional stations and created a group of architecturally cohesive buildings including those at Garelochhead, Bridge of Orchy and Rannoch.

The station was renamed Tyndrum Upper in the 1950s to avoid confusion with an earlier Tyndrum station built for the Callander and Oban railway line. Signal boxes represent a distinctive and increasingly rare building type that contributes significantly to Scotland's industrial heritage. Of more than 2000 signal boxes constructed across Scotland by 1948, approximately 150 survive as of 2013. The pre-1948 mechanical boxes that remain in operation on the public network were scheduled to become obsolete by 2021, making Tyndrum's example an important surviving witness to this heritage.