Thousands of evacuated residents have been left assessing the damage to their homes following the detonation of a World War II bomb in a blast that left a crater the size of a double-decker bus and was heard 10 miles away. More than 2,600 people had to be flee before the controlled explosion of a recently unearthed Nazi 'Hermann bomb' in Exeter, Devon on Saturday evening. A 400-yard cordon was put in place with 1,400 university students among those evacuated. When the bomb was detonated a huge cloud of dust was shot into the sky above - leaving several nearby homes with structural damage.