In The Salisbury Review Dalrymple recounts a recent speech at which leftist protesters surrounded the hall:

I spoke immediately before Katie Hopkins, who guarded by a close protection squad, was scheduled to appear (she was the last speaker of the day). The banging on the windows and chanting began just as I was ending.Two or three protestors wearing motor cycle helmets and masks broke into the hall with a crowbar and a member of the audience hit one of them over the head with the leg of a chair.Then the eggs started flying. One of the policemen looked as if he were about to be scrambled. Despite the assaults on the police no charges are contemplated