The call on Wednesday will include Sir Keir, Volodymyr Zelensky, Emmanuel Macron and Friedrich Merz, who will later be joined by the US President.

It took 20 months to hit the milestone under Rishi Sunak’s premiership compared with 13 months under Sir Keir Starmer.

White House press secretary Karoline Leavitt has addressed the large age gap with her husband, who is 32 years her senior ...