A video has been shared of the alarm going off at M&S and the shutters being pulled down this afternoon (Friday, August 7). An eyewitness said they saw people being evacuated from the shop. Customers are patiently waiting outside the store to be let back in. The shutters were down on M&S (Image: NQ)Merry Hill has confirmed an alarm briefly went off in the store due to a customer "accidentally knocking one of the wall mounted alarms". More to follow.