The Bison was an extemporised armoured fighting vehicle frequently characterised as a mobile pillbox. Bisons were produced in Britain during the invasion crisis of 1940-1941. Based on a number of different lorry chassis, it featured a fighting compartment protected by a layer of concrete. Bisons were used by the Royal Air Force (RAF) to protect aerodromes and by the Home Guard. They acquired the generic name “Bison” from their main manufacturer.
This Home Guard Thornycroft Bison was on display at Bovington.
It’s a good illustration of the desperate state of the defence of the United Kingsom in 1940. Take a lorry and add some concrete to turn it into an armoured vehicle. They were really no more than mobile pillboxes.
I have been thinking about converting a lorry for my Home Guard forces.