A door-to-door Covid-19 testing blitz of 80,000 people in England begins today in eight areas in a bid to find "every single case" of the mutant South African strain.
Health officials have launched the extraordinary effort to stop the spread of the more infectious strain that experts fear could be more resistant to vaccines.
In England, 105 cases of the strain have been detected, and 11 cases of the variant identified over the past week were in people who had no links to travel, prompting concerns the mutation may be spreading in communities.
Mobile testing units and home testing kits will be deployed to eight postcode areas where the variant has been discovered as the UK Government looks to prevent it getting a foothold.