Surge testing begins in Stockton after discovery of South African variant The South African covid variant was discovered in the town on Thursday Updated The video will auto-play soon8Cancel Play now Subscribe When you subscribe we will use the information you provide to send you these newsletters. Sometimes they’ll include recommendations for other related newsletters or services we offer. OurPrivacy Noticeexplains more about how we use your data, and your rights. You can unsubscribe at any time. Thank you for subscribingWe have more newslettersShow meSee ourprivacy notice Thousands of extra coronavirus tests are being rolled out across Stockton after a mutation of the South African variant was discovered in the town.