New strain of coronavirus identified in England as London moves to Tier 3

A person wearing a face mask passes a Christmas tree at Covent Garden, London, as the capital and parts of Essex and Hertfordshire will face Tier 3 restrictions from Wednesday.
A new strain of coronavirus has been identified in southern England as tougher restrictions were imposed in London.
The capital and parts of Essex and Hertfordshire will face Tier 3 restrictions from Wednesday following āvery sharp, exponential risesā in cases.