challenger

Miliband's name has been discussed by some Labour MPs as another possible challenger to the prime minister.

In order to trigger a leadership contest against the prime minister, challengers would need the support of 20% of Labour MPs, which currently means 81 nominations would be required.

He was responding to briefings from allies of Sir Keir that the prime minister would fight any challenge to his leadership, with Streeting's name mentioned as a potential challenger.

In order to trigger a leadership contest against the prime minister, 20% of Labour MPs - currently 81 - would need to nominate a challenger.

His company has announced AI chips squaring up to sector heavyweight Nvidia and challenger AMD.