Boris Johnson will head to France and Germany this week to call for a new Brexit agreement in his first international test as leader.
He will meet with the French president and German chancellor ahead of the G7 summit in the French city of Biarritz.
At the summit Mr Johnson is expected to meet with United States president Donald Trump for the first time since he became Prime Minister.
Meanwhile, it has been revealed the government spent more than £10 million on a Brexit preparation advertising campaign between November 2018 and July.
It spent £10,842,063 on the Prepare for EU Exit adverts that included £2.7 million on print, £2.4 million on radio, £1.2 million on TV and more than £1 million on social media advertising.
The large majority of this was spent under Theresa May’s premiership.
Labour MP Wes Streeting said the money would have been better spent elsewhere.
“Brexit is already costing us dearly and we haven't even left yet,” he said.
“Every single penny spent on this advertising campaign to prepare for the self-inflicted damage that is Brexit would have been better spent on policing, schools and the NHS.”
A government spokesman said: “It is paramount that organisations, communities and citizens have the right information and support for Brexit.”
“We have stepped up preparations to ensure we are ready for Brexit and we have been reviewing the guidance we are issuing across Whitehall to ensure we are fully prepared for leaving on 31 October, whatever the circumstances.”