Britain said it was in discussions with Swiss pharma giant Roche to mass purchase its coronavirus antibody test after scientists claimed it was “100 per cent” accurate, AFP reported.

“This test developed by Roche appears to be extremely reliable, it's got the green light from testers,” health minister Edward Argar told the BBC.

“We are currently in discussions with Roche about that. We are very keen to get that test on stream as swiftly as we can,” he added, calling it a potential “game changer”.