Starmer’s growth plan ‘doomed’ without access to EU markets, warn economists

Labour leader told if elected he will have to rejoin the customs union to meet party's manifesto pledges, while 56% of voters say Brexit was bad for economy

A Labour government under Keir Starmer will fail to maximise the UK's economic growth unless it takes the country back into the European Union's single market and customs union, leading economists and diplomats have said.

The warnings come as an Opinium poll for the Observer finds that 56% of voters now believe Brexit has been bad for the UK economy as a whole, compared with just 12% who believe it has been economically beneficial.