LONDON—EasyJet plans to fly 60 percent of its pre-pandemic capacity in July-September as a travel recovery takes hold in mainland Europe, and Britain is expected to catch-up in the coming weeks. The British airline said it was confident on demand for the summer and autumn, issuing its most buoyant update since the start of the pandemic almost a year and a half ago, and allowing it to lift capacity from just 17 percent of 2019 levels in March-June. The travel pick-up has to date been led by the European Union, said easyJet, leading it to shift planes from Britain to markets including Scandinavia and Holland. Two-thirds of bookings are currently coming from the rest of Europe, while normally its business is evenly split between Britain and the continent, but easyJet expects that to change now travel rules for fully-vaccinated Britons have been relaxed. “I have absolutely no doubt in my …