Greater Manchester has now been placed in Tier 3 by the government - the 'very high' Covid alert level. Manchester had been placed in Tier 2 just days ago.Under Tier 3 rules, all shops are able to remain open - even those which were classed as 'non-essential' earlier this year.However, shoppers will be required to follow certain rules when in supermarkets, high street stores and hardware shops - to name a few.The official government guidelines state that 'shops following COVID-secure guidelines