Boris Johnson rewriting Brexit plan could damage UK's reputation, Theresa May warns

Boris Johnson’s threat to unilaterally re-write parts of his Brexit agreement could damage Britain’s reputation abroad, Theresa May has warned.

Speaking in the Commons on Tuesday the former prime minister said the government needed to “reassure” other countries that the UK would stand by its word.

The concerns come ahead of a major push by Mr Johnson to strike trade deals with other countries around the world when Britain leaves the EU customs union at the end of the year.

“The UK Government signed the Withdrawal Agreement with the Northern Ireland protocol, this Parliament voted that Withdrawal Agreement into UK legislation,” Theresa May said in a debate following an urgent question on government plans.

"The Government is now changing the operation of that agreement. Given that, how can the Government reassure future international partners that the UK can be trusted to abide by the legal obligations of the agreements it signs?"