London: Former British prime minister Tony Blair has urged Britons to "rise up" and demand a second opportunity to vote on remaining in the European Union.

Mr Blair also took a swipe at Labour leader Jeremy Corbyn, saying the "debilitated" opposition party "facilitated" Brexit.

Pro-Brexit campaigners immediately condemned the intervention, with Foreign Secretary Boris Johnson urging voters to rise up and turn their TVs off when Mr Blair came on.

Speaking at Bloomberg's headquarters in London's financial district, where former Tory prime minister David Cameron announced the EU referendum five years ago, the former Labour leader said he was creating a new political movement to coalesce Remain activists to promote globalisation and stop Britain hurtling towards "Brexit at any cost".