World War Two historians James Holland and Al Murray stop off explore a remarkable battle relic from  Normandy 1944. Meet the AVRE - 'Armoured Vehicle Royal Engineers' - a British innovation born from the classic Churchill tank but with a twist: it boasts a powerful 230mm petard mortar, expertly designed for D-Day to take out German concrete bunkers and defences at close range. Dubbed 'flying dustbins' by the troops, these extraordinary armoured fighting vehicles not only supported British forces on D-Day but also played a crucial role throughout the liberation of north-west Europe until the war's end.