St Thomas Hospital (Original Building with the Rear Wing in the Courtyard)

St Thomas Hospital, originally built as a workhouse in 1841 by Bowman, is a two-storey brick building that has been rendered, featuring rusticated quoins and a Welsh slate roof. The building has a string cornice, with projecting ends that each contain one hung sash window with glazing bars above a double door with four panels, which is topped by a rectangular fanlight with four panels. The doorway is flanked by plain pilasters and has a flat hood supported on consoles. The central section has a 1-3-1 window arrangement, with hung sash windows that have glazing bars; the outer windows are narrower. A chamfered stone band separates the storeys. The ground floor has two windows without glazing bars flanking a modern door beneath a rectangular fanlight, which is accompanied by narrow flanking lights and a shallow pediment on long consoles, accessed by three steps, and sits on a plinth.

The rear wing, located in the courtyard, is four and three storeys high, constructed of red brick and topped with a Welsh slate roof. It features end pavilions with three windows, linked by three-storey sections with six windows (some of which are blocked), leading to a four-storey block with three windows, followed by a one-window section that is three storeys high, culminating in a canted centre block with a 1-3-1 window arrangement. This centre block is topped with a clock and campanile, which has paired pilasters and a lead cupola.