Labour opens up biggest lead over Tories since general election

Opinium poll puts Jeremy Corbyn’s party four points ahead as Ukip revives Labour has opened up its biggest poll lead over the Conservatives since shortly after last June’s general election, as the government’s chaotic handling of Brexit appears to have triggered a dramatic fall in support for Theresa May and the Tories – and a sudden revival of Ukip.The latest Opinium poll for the Observer puts Labour on 40%, the same score as last month, but four points ahead of the Tori