This kit represents the carriages introduced in 1911 for the Brighton / West Worthing motor train services. There were four two-car trains, each consisting of a driving trailer third brake (Diag 182), and a trailer composite (Diag 110). The two vehicles were semi-permanently coupled. An innovation was the side corridor to enable the conductor/guard to issue tickets on the train to passengers joining the train at intermediate halts. There were no compartments in the accepted sense, the seats immediately adjoining the corridor. There were, however, corridor doors to seperate smoking from non-smoking and first from third class.
Motive power was usually a motor-fitted D tank. During slack periods a single two-car set would suffice, but at other times two sets would be used, one coupled in front and the other behind the loco, driving cabs at the outer ends. Such a formation can be seen in picture No. 106 in the Middleton Press Book, South Coast Railways - Brighton to Worthing, Pub 1983.
The style of train appears to have been successful, since further motor trains were put into traffic in 1912, 1914, 1921 and 1922. Each successive batch differed slightly from those previously built.
The 1911 trains continued into use into Southern Railway and British Railways ownership. Two of the sets were modified with the sliding drivers' doors removed and double luggage doors fitted, and sent to the Isle of Wight, in 1938 and in 1947, both being withdrawn in 1954. The two sets remaining on the mainland lasted until 1959 and 1960.