One of two brake composite carriages delivered from the Metropolitan Carriage & Wagon Co., Ltd., of Saltley Works in Birmingham in 1913, the other being F.46; these identical vehicles are composites made up of a guards’ compartment with double doors and lookout windows in the bulkheads, two central first class compartments and the remaining three third class compartments; arriving with torpedo roof vents these have been removed with most other original features retained; it retains some of the equipment from the Stones Electric Lighting, though when used after dark today it is fitted with car batteries in the locker in the guards’ compartment to power the illuminations.  Since 1985 this carriage has been turned so that the guards’ compartment is situated at the northern end.  In 2015 the first class compartments were fitted with seat dividers and armrests which reduced the overall capacity to 46 from 48, there being accommodation for three passengers per bench in these compartments rather than the more usual four.  It carries Ailsa Era crests featuring No.16 Mannin in green in common with the other Large Fs in traffic.