It comes as Western officials say less than 30,000 troops could be stationed in Ukraine as part of a peace deal.

Several European countries are furious at feeling they have to dance to the US tune on Ukraine, says Katya Adler.

The PM says "a US security guarantee is the only way to effectively deter Russia from attacking Ukraine again".

Sir Keir Starmer said securing a lasting peace in Ukraine was "essential" to deter Vladimir Putin from future aggression.

Sir Keir Starmer says the figure is a "shot in the arm", but "the job isn't done" to bring down waiting lists.

The UK PM, who is expected to attend, said it was a "once in a generation moment for our national security".

The PM reaffirms the UK supports Ukraine's "irreversible path" to joining NATO in a call with Volodymyr Zelensky.

The US says it is unlikely that Ukraine will become a Nato member, despite a long-standing commitment to join.