Senior Tory says Boris Johnson should resign if he breached ministerial rules

Leader of Scottish Conservatives says PM should of course' quit if he has not been honest about payments for Downing Street refurb

One of the UK's most senior Conservatives has broken ranks and called for Boris Johnson to resign if he breached ministerial rules over the refurbishment of a Downing Street flat, amid new claims that undeclared donations have been sought to fund the prime minister's lavish lifestyle.

Douglas Ross, the leader of the Scottish Conservatives, said on Sunday that Johnson should of course" quit if he is found to have breached the code by failing to be honest about cash payments from a Conservative donor sought to redecorate his official residence.