Elon Musk has ramped up his row with the UK as he branded the prime minister “two-tier Keir” and questioned if it was “Britain or the Soviet Union” after a man was apparently arrested over Facebook comments.

The billionaire owner of X has been engaged in a war of words with Sir Keir Starmer over riots gripping the UK, amid concerns online disinformation is fuelling the unrest.

In his latest rebuke, Musk reposted a video appearing to show police officers arresting a man for making offensive comments on Facebook.

“Arrested for making comments on Facebook!,” Musk wrote on X.

“Is this Britain or the Soviet Union? Is this accurate @Community Notes.”