Foreign Secretary Yvette Cooper was asked if Sir Keir had joined Trump’s peace board in the House of Commons on Tuesday but did not respond directly to the question.
“We supported the 20-point plan to achieve a ceasefire in Gaza,” Cooper said.
“That is still fragile and there’s still a huge amount of work to do, including humanitarian surge and support, and including the decommissioning of weapons from Hamas.
“There’s a huge amount of work still to do but it’s really important that the whole international community comes together in order to support that.”
Sir Keir has cultivated a good relationship with Trump, despite their differences over the UK’s decision to recognise the state of Palestine last year.
The prime minister has been criticised for going abroad frequently but when speaking to Labour MPs on Monday, he defended his focus on foreign affairs and attempted to link it to his domestic policy agenda.
“The cost of living crisis will not be solved by isolationism,” Starmer said.
“One thing that is crystal-clear is that we are moving into a world that is very different to the one most of us grew up in, and in a world this volatile you have to be on the pitch.
“You have to be in the room to tackle the issues working people care about.”