Urgent testing for the South Africa variant of coronavirus is beginning in Surrey, London, Kent, Hertfordshire, Bristol, Walsall, and Birmingham after cases were found with no known links to travel or previous cases. The variant, which was identified as part of Public Health England's random checks on tests, prompted fears there may be community transmission of the virus. It is not known how many cases have been identified. Mobile testing units have been dispatched to a number of neighbourhoods where the cases have been identified.