Twelve people have been arrested over an alleged 'right-wing terror threat' to an Islamic event at a country estate in Suffolk, police said.

Counter Terrorism Policing (CTP) said the UK Ijtima event at Shrubland Hall at Barham was ended early on Sunday as a precaution after the possible threat.

Home Secretary Shabana Mahmood said the response of the police in tackling a "credible threat" to the festival had "undoubtedly saved lives".

Commander Helen Flanagan, head of CTP London, said officers moved quickly to make the arrests across various locations across the country.