The Kent variant of coronavirus that has been spreading around the UK appears to be undergoing some worrying new genetic changes, say scientists. Tests on some samples show a mutation, called E484K, already seen in the South Africa and Brazil variants that are of concern. Although this change may reduce vaccine effectiveness, the current ones in use should still work, say experts. The UK has already stepped up measures to control the spread of new variants. Urgent testing for the South Africa variant is starting in parts of England and travel restrictions have been introduced to stop more cases entering from abroad. Experts working with Public Health England have only found a handful of cases of the UK variant with the E484K mutation – it was seen in 11 out of 214,159 samples that they tested.(BBC)…[+]