Mandatory Credit: Photo by Geoff Robinson/REX (10592621l) Shoppers queuing for the checkouts in Tesco in Cambridge which was packed out during 'NHS staff hour' after members of the public did not stay away and entered the store without being checked which resulted in the store having to shut it doors.A Tesco store in Cambridgeshire was forced to shut its doors this morning (Sun) after selfish shoppers invaded the hour reserved for NHS staff, causing 'bedlam.'The shop in Milton, near Cambridge, had to start operating a one-in one-out policy from 10.15am after hundreds of members of the general public started shopping too early and the store quickly became full too capacity.The supermarket had set aside a dedicated shopping hour for NHS staff between 9am and 10am and for the first half hour it asked shoppers for ID. Coronavirus outbreak, Cambridge, UK - 22 Mar 2020