EasyJet on Monday said it was cancelling flights to and from the UK after high Covid rates in Europe left the British airline with a lack of staff. It comes as the global aviation industry, despite recovering after lockdown curbs were lifted, has come up against a new costly headwind in the form of soaring fuel costs. EasyJet rival Ryanair on Monday revealed it expected to post a net loss of at least €350 million ($384 million) in its financial year just ended. That compared to a loss of at least €250 million ($275 million) in an earlier forecast made by the Irish carrier. EasyJet said separat…