Sir Keir Starmer wants to bring down “staggeringly high levels” of migration but will not set “arbitrary” caps, Downing Street has said.

“We’re going to publish a White Paper to set out a comprehensive plan to end these staggeringly high migration numbers,” the prime minister’s spokesman said.

“As the prime minister has previously said, we had a supposed cap in place before and it didn’t have any meaningful impact on reducing immigration.

“So he doesn’t think that setting an arbitrary cap, as previous governments have done, is the best way forward in terms of significantly reducing migration.”

Minister: There have never been plans to expand definition of extremism

Over in the House of Commons, shadow home secretary Chris Philp is asking an Urgent Question on a review into extremism which was leaked this morning.

The Home Office review allegedly recommended that the UK’s approach to extremism should be based on concerning behaviours and activity rather than ideologies.

These include spreading misinformation, influencing racism, and involvement in “an online subculture called the manosphere”, according to the Policy Exchange thinktank, which obtained a copy of the review.

However, reacting to this, security minister Dan Jarvis earlier said ministers have “rejected this advice”.

Answering the Urgent Question, Mr Jarvis says that “many documents are produced across government as part of commissioned work which are not implemented and which do not constitute government policy.

“This work did not recommend an expansion in the definition of extremism, and there are not and have never been any plans to do so.”

He says the leaked documents were “not current or new government policy”.

Mr Jarvis reiterates that Islamist extremism followed by far-right extremism are the “biggest threats that we face”.

However, he does say “we need more action on those drawn to mixed ideologies and violence-obsessed young people”.

“There has been a troubling rise in the number of cases involving teenagers drawn into extremism, including islamist extremism, far-right extremism, mixed and confused ideology and obsession with violence.”

This includes a “three-fold increase in under-18s investigated for involvement in terrorism”.

Mr Jarvis says 162 people were referred to anti-terrorism scheme Prevent last year for “concerns relating to school massacres”.