Plan B

Newspaper headlines: Rudd resigns and Johnson's 'threat to EU'

The Sun on Sunday reports the prime minister is "plotting" to get round it by "paralysing" EU decision-making, to "provoke them into kicking the UK out."

"The gloves are off", a senior Westminster source tells the paper.

The Sunday Telegraph suggests Mr Johnson could challenge the new law in the Supreme Court, with Dominic Cummings - the prime minister's chief aide - creating a "shadow" team of advisers to work on the plan.

A senior Whitehall source tells the paper Mr Johnson's allies will "take a chainsaw to anything in order to leave".

The Sunday Express publishes what it calls "a heartfelt appeal" from the prime minister to its readers.

He says he will give Jeremy Corbyn "one last chance" to agree to a general election - and if he refuses the government will "simply carry on".

That would be a very risky strategy, according to The Observer.

The paper has seen the advice given to Labour by a team of leading QCs, which concludes Mr Johnson would be declared in contempt of court if he ignores the law MPs have passed.

"Britain is a rule-of-law country, so he will comply or leave office," says one of the barristers. "All other talk is bluster."