A new offence to cover lone individuals planning non-terrorist mass killings should be considered in the wake of the Southport attacks, the UK's terror watchdog has said.

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The UK’s terror watchdog has recommended the creation of a new offence after a gap in the law meant police “could not arrest” the Southport killer before he carried out his attack. At such a critical moment in US history, we need reporters on the ground. Your donation allows us to keep sending journalists to speak to both sides of the story.

Jonathan Hall KC warned against expanding the definition of terrorism, instead calling for a new criminal offence targeting loners who plot mass killings like Axel Rudakubana and Nicholas Prosper

Jonathan Hall KC said it was "horrifying" officers couldn't intervene despite knowing Rudakubana planned mass killings.