Dominic Raab has admitted that lying to parliament is “normally” a resigning matter, amid claims that the prime minister deliberately misled MPs over his knowledge of a Downing Street party.

Boris Johnson’s former senior aide Dominic Cummings had earlier accused the prime minister of lying when No 10 denied Johnson had been warned against allowing a “bring your own booze” garden party during lockdown.

The justice secretary said it was “nonsense” that Johnson had lied to MPs, saying he felt the prime minister’s account was to be believed. But he added that any deliberate falsehood in the Commons would leave Johnson in jeopardy.