British Prime Minister Keir Starmer is heading into this week's Nato summit in Ankara, Turkey on under rising pressure, with senior US officials signalling dissatisfaction over the UK's defence spending plans and warning that alliance members falling behind must accelerate their commitments.

The PM wants to be remembered as the man who salvaged Britain's reputation as a military leader among allies. But is this enough to stave off criticism?

The prime minister is set to meet key Nato allies in Ankara, Turkey, this week