There is ‘no reason to assume’ that Delta will be the most contagious Covid variant, Government scientific advisers have warned.
Both Alpha and Delta sparked an explosion in infections when they emerged in the UK, forcing ministers to impose restrictions or delay plans to lift controls.
But No10’s panel of top scientists, which includes Professor Chris Whitty and Sir Patrick Vallance, have been told it is still possible the scenario could be repeated through an even more infectious strain.
This