SIR Keir Starmer was warned in the Commons today that he could not write a “blank cheque” in support of Ukraine.

At Prime Minister’s Questions, Tory leader Kemi Badenoch placed her party on the sceptical side of the gung-ho premier, who favours the continuation of Kiev’s fight to expel Russian invasion forces.

Ms Badenoch told MPs that the Conservatives supported “efforts to resolve this conflict, but we cannot write a blank cheque.