but, though bogies had come into use on other railways, the LNWR preferred to simply add an extra radial truck. This configuration remained in use until 1893, when Charles Park built a rake of corridor coaches for the expresses to Edinburgh with six-wheeled bogies. This was first and third class only, although second class remained for many other services until 1911. In 1892, the non-automatic brake finally disappeared and in 1896 Stone's patent electric train lighting was introduced, along with communication cords. Twentieth century In 1901, Wolverton was the first railway works to use electricity for lighting and driving machinery throughout. All coaches for principal services now included corridor connections and were mounted on bogies instead of radial trucks. During World War I, the works altered carriages to be used as ambulance trains both within the UK and overseas. Part of the works was also turned over for use by the Ministry of Munitions. In 1923, when the LNWR merged into the LMS, wagon building was introduced. From 1926 the works was supplied with electricity from Northampton Power Station. At the outbreak of World War II, as a major manufacturing facility, the works was camouflaged, with the exterior walls still showing signs of green paint. No Luftwaffe bombs landed on Wolverton, although nearby New Bradwell suffered the destruction of some housing and the loss of five lives due to aerial bombing. The works itself ceased all railway-associated work, instead using its vast engineering and wood working to produce Horsa gliders for the D-Day airborne assault. It also repaired Whitley bombers, Hawker Typhoon wings and converted some seven hundred commercial motor vans into armoured vehicles. Post-war it continued its carriage and work construction work, including making large numbers of the all-new British Railways Mark 1 carriage, until the intervention of Dr. Beeching. In 1962, the works was downgraded to a repair facility, with the last new vehicle being completed in 1963. By 1964 the workforce had dropped from 4000 to 2000, but the works had picked up new work through the repair and maintenance of the British Rail Class 304 Electric Multiple Units. Although no new general service carriages were built, twenty four vehicles were built in 1977 for the Royal Mail, and twenty one diesel multiple units for the Northern Ireland Railways. In February 1986 British Rail Engineering Limited split into two new groups, with Wolverton becoming part of the