Boris Johnson has arrived arm in arm with girlfriend Carrie Symonds in Manchester for a Tory party conference which faces being overshadowed by moves to oust him at Westminster.
The Prime Minister also faces pressure over his links with businesswoman Jennifer Arcuri while he was London mayor.
Mr Johnson refused to answer questions about his political and personal battles as he arrived with Ms Symonds at the Midland Hotel ahead of the conference, which begins on Sunday.
A small group of protesters gathered outside the ring of steel which surrounds the conference venue, and their anti-Brexit cries could be heard as Mr Johnson got out of his ministerial Jaguar.
“Boris is a liar” and “get your Johnson out of our democracy” were among the slogans chanted by the demonstrators.
Posting on Twitter on Saturday evening, Mr Johnson said: “Arrived in Manchester for our Conservative Party conference. Let’s get Brexit done!”
The Government’s defeat in the Supreme Court and its failure to win a Commons vote to schedule a recess for the conference means that Tory MPs face shuttling between Manchester and Westminster to counter the threat of an ambush by opposition parties.
A senior SNP MP said the opposition parties could stage a vote of no-confidence in the Government as early as next week in a bid to replace the Prime Minister with a caretaker leader who would secure an extension to the Brexit deadline.
Labour’s Jeremy Corbyn is expected to convene another meeting of opposition leaders in Westminster on Monday to plot their next moves aimed at preventing a no-deal Brexit on October 31.
Speaking to reporters at a rally in Chingford, Essex, Mr Corbyn said he stood ready to lead an interim government if Mr Johnson was forced from No 10.
Mr Johnson is also under pressure over his conduct as mayor after he was referred to the police complaints body to assess whether he should face a criminal investigation over his links with American businesswoman Ms Arcuri.
The Greater London Authority (GLA) said its monitoring officer had recorded a “conduct matter” against Mr Johnson over allegations Ms Arcuri received favourable treatment because of her friendship with him while he was mayor of London.
The Independent Office for Police Conduct (IOPC) will now consider whether there are grounds to investigate the Prime Minister for the criminal offence of misconduct in public office.
The move was greeted with fury in Downing Street, which denounced the referral by the GLA, led by Labour mayor Sadiq Khan, as a “nakedly political put-up job” on the eve of the party conference.
Cabinet minister Theresa Villiers said: “I think this whole thing has been blown out of all proportion.”
The Environment Secretary told the BBC’s Today programme: “This seems to be pretty obviously a politically motivated complaint.
“The Prime Minister has been clear there is nothing to see here. I do feel this is a distraction and it is people seeking to use the complaints process in a highly political way.”
But Mr Corbyn told reporters: “A wholly independent assessment has looked at evidence of the payments made by the mayor’s office to one particular company and says there are serious questions to answer.
“I think the job of the Prime Minister is to answer those questions.”