Churchill's invasion response strategy

17th August 1940: The mobile reserves to counter any German invasion are now in place, ready to be sent swiftly to any coastal landing

A 'fighting column' from the South Wales Borderers man their motorcycles which are parked in a suburban street in Bootle, Liverpool, England, 16 August 1940. This training operation formed part of British preparations to repel the threatened German invasion of 1940.