Birmingham, Kent, Newcastle and Manchester will be in Tier 3, while London and Liverpool will be placed in Tier 2 of England's new lockdown system.
The Prime Minister is due to hold a news conference later today to explain his reasons behind the tier system.
But prior to the announcement the government launched a postcode checker for England's regions.
Find out what tier you are in: www.gov.uk/find-coronavirus-local-restrictions and find the full list here: www.gov.uk/guidance/full-list-of-local-restriction-tiers-by-area
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