9 ways Britain could stay in the European Union

Charles Grant, director of the Centre for European Reform, agreed. "The political imperative of keeping the Brits in the club would override any legal concerns," he said. ...Charles Grant believes the Labour Party would have to commit to taking Britain back into the European Union if Brexit is to be halted — something Corbyn has shown little commitment to thus far.

...Grant said: “Once it has left, it could reapply to join like any other non-EU country in Europe. The negotiations would take several years and the U.K. would probably not be able to regain the special position it currently enjoys — with a rebate on its budget contribution and opt-outs from many policies.”