Forty caravans have been destroyed and another 40 damaged by the heat in a huge blaze at a caravan park. Firefighters were called to the storage yard on Ainmoor Grange Caravan Park, in Stretton, Derbyshire, about 05:30 GMT. When they arrived, they were faced with “a significant developed fire”. No-one was injured. John Cook, from Derbyshire Fire and Rescue Service, …