The UK has reported another 55 cases of the ‘double mutant’ Covid-19 variant, first detected in India, while Belgium tracked down its first cases of the strain that scientists fear could be more resistant to vaccines. The latest figure, reported by Public Health England on Thursday, puts the total number of B.1.617 Covid-19 strain cases in the UK to 132, an increase from 77 reported a week ago. Earlier this week, the UK added India to its travel ‘red list’ over the new coronavirus strain, which Health Secretary Matt Hancock described “a variant of concern.”