With the blitz taking its toll, Britain had to keep it's manufacturing going, leading to the birth of shadow factories. These large underground hidden sites were crucial in the ammunition production; one of the most expansive being Drakelow Tunnels.

As Britain's victories mounted so did the prisoners of war. Across Britain a network of camps sprang up and the best remaining example is Eden Camp in Yorkshire. It remains a fascinating insight into life in the camps and what having POWs living in the UK meant for the locals.

Rob Bell looks at how the greatest invasion in human history was being prepared in Southern England and the buildings that helped with D-Day and Operation Overlord. There were whole villages that were taken over by the MOD, and in the case of Tyneham, never returned.