The hard-Right party Restore Britain has descended into open warfare as one of its most prominent backers said it ‘served its purpose’.

It came after leader Rupert Lowe was seen in an interview clip defending the King’s invitation of Muslim worshippers to Windsor.

The MP said: ‘He’s certainly very keen to propagate a multicultural society, which again I have no problem with if people integrate.’

His words sparked immediate backlash, with prominent supporter and activist Connor Tomlinson blasting: ‘Multiculturalism has not worked, will never work, and was never wanted.

‘If Restore Britain amounts to nothing more than a pressure campaign, then it has served its purpose.’

Restore Britain leader Rupert Lowe is facing a backlash from his own party after defending the King’s invitation of Muslim worshippers to Windsor

Mr Tomlinson also criticised the party’s ‘structural problems’ and ‘weak candidates’, which he warned has ‘possibly squandered’ the opportunity to overtake Reform UK as the party of the Right.

A source told the Daily Mail: ‘Restore are already tearing themselves apart… Rupert should do everyone a favour and join the Tories already.’

Restore was approached for comment.