By Ryan Fahey Bomb squads descended on a quaint market town to carry out a controlled explosion after an ammunition shell was donated to a charity shop. Army experts rushed to Wem, Shropshire, and sealed off part of the town centre after the device was discovered by staff in a bag of donations at the Severn Hospice store. Police moved the 10-inch (25cm) item to a nearby car park on Leek Street and put up a 30-metre cordon before the bomb disposal unit arrived. An Explosive Ordnance Disposal team then carried out a controlled explosion following the security alert on Wednesday afternoon, April …