The 50th (Holding) Battalion was formed in the United Kingdom on 28 May 1940. On 9 October 1940, it was renumbered as the 10th Battalion. 10th Battalion was assigned to 225th Independent Infantry Brigade (Home), formed for service in the United Kingdom. When the brigade was converted into a tank brigade in December 1941, the battalion became the 151st Regiment Royal Armoured Corps. When 107th RAC was disbanded in December 1943, a cadre transferred to 151st RAC, which adopted the number of 107th to perpetuate the 5th Battalion, King's Own, a 1st Line Territorial Army battalion. The new 107th Regiment went on to serve in the North-west Europe from 1944-1945.