In a 6-3 decision, justices voted in favour of birthright citizenship, rejecting an executive order by the president issued at the start of his second term.

The extra funding will help "make the British people safer", the prime minister says, but it is short of the £28bn the Ministry of Defence had requested.

The Labour MP will set out plans for more power for English regions, and to drive growth "across every nation and region of the UK" - but he is not expected to take questions.

A red extreme heat warning is in place for London and south-east England, with several thunderstorm warnings issued for parts of the UK.