UK health authorities are carrying out the country’s “largest surge testing operation” so far to curb the spread of the South African variant of the CCP virus in parts of South London, the Department of Health and Social Care (DHSC) said on Monday. Extra testing and genomic sequencing are taking place across parts of South London, mainly in the boroughs of Wandsworth and Lambeth, where a cluster of cases of the mutant virus have been found since early March. To date, 44 confirmed cases and 30 probable cases have been found, the DHSC said, adding that all identified cases are isolating or have completed their isolation, and their contacts have been traced and asked to isolate. Dr. Susan Hopkins, chief medical adviser for NHS Test and Trace, said the cluster of cases in South London is “significant” and urged people in the local area to “play their part in stopping …