The worst single loss of life happened on Tuesday December 19 , 1944 . The 367th V-2 rocket which hit England fell near the Hoffmans ' ball bearing factory . The worst single loss of life took place on Tuesday 19 December 1944 , when the 367th Vergeltungswaffe 2 or V2 rocket to hit England fell on a residential street ( Henry Road ) near the Hoffmans ball bearing factory and not far from the Marconi Wireless Telegraph Company factory in New Street which may also have been the target .