thereby giving a larger proportion of the length of the vehicle over to the load bed. However in a report of 1910 they had just launched a 25cwt truck with conventional bonneted layout. In 1913 Clayton built a truck according to WD guidelines and were successful in getting it certified under the War Office Subsidy Scheme. The scheme was aimed at having vehicles in civilian use that were fit for immediate use by the military in time of war. When the war began in mid-1914 the manufacturers of certified vehicles were in a good position to supply vehicles direct to the war department, and Karrier produced their "subsidy" 3–4 ton B4 truck throughout the war. At the end of the war they continued the 3-4 ton model and added 5-ton chain driven model (the B110). In 1920 Karrier announced they had been developing their own engine for some time, and this would now be fitted in all their models. At the 1920 October Commercial vehicle show at Olympia they had their 4 and 5 ton goods models plus a road sweeper and the Karrier "Superb" char-à-banc on display. At the 1921 show they added a three-way tipper truck, and offered their other chassis models with the driver moved forward partly alongside the engine, allowing 2 foot more load bed/passenger space. In 1922 they launched their first small capacity chassis since before the war, the type C for 30cwt load, and type CX for 2 ton load or 14 seat char-à-banc. The 30cwt was certified under the post-WW1 War Department Subsidy Scheme which ran from 1922 to 1935. Light tractor units Colt In 1929, Karrier started production of the "Colt" three-wheeler as a dustcart chassis for Huddersfield Corporation. In 1930, this was developed into the "Cob" tractor to haul road trailers for the London, Midland and Scottish Railway. Later, in 1933, Scammell produced their own, Napier designed, Scammell Mechanical Horse. In the mid-1930s, the "Cob" range was supplemented by the four-wheel "Bantam". Cob Described by newspapers, quoting Karrier, in 1930 as a "mechanical horse" the small "Cob" tractor was designed by J Shearman, road motor engineer for London, Midland and Scottish Railway. Its small wheels let it turn in confined spaces and manoeuvre more easily in traffic. The front wheels are lifted from the ground when the tractor is attached and it was then classed as an articulated vehicle. It was