Like most of the railway works, Eastleigh was heavily involved in the war effort, producing, in 1938, sets of parts to convert Blenheim bombers so that they could be used as fighters. The works was also part of a joint venture with other workshops, railway and private, to produce Horsa gliders for the D-Day airborne assault. With Lancing works, it turned out 200 tail units. It also produced 1,500 anti-tank gun barrels and, with Brighton railway works, 240 multiple rocket launchers, plus landing craft, fuel tenders and harbour launches.