My partner Linda is working for the London Labour Party and witnessed the incident today which resulted in - according to the BBC - "a man in his 30s ... arrested on suspicion of assaulting two female Labour Party volunteers in east London": http://news.bbc.co.uk/1/hi/uk_politics/election_2010/8638267.stm
Linda was the person who alerted the local police. She and other Labour activists assumed it was BNP thugs attacking John Prescott, such was the physical nature of the attempt to disrupt him speaking.
She took these pictures of the idiots who were involved.
Wearing their masks before trying to disrupt Prezza speaking:
After being unmasked in a "Scooby-Doo" moment when they were recognised as the Tory candidates for the East India & Lansbury Ward and before a chat with the Met's finest:
Well done to John Prescott for continuing his walkabout meeting local voters despite pesky Tory candidates.