He was willing to answer questions for the first time since hip surgery in January, but was positioned so he could make a quick getaway if he wanted to stop responding.

NPR: Alex Rodriguez Calls Return 'A Great Challenge'

Responding to the review Bob Quick, former Assistant Commissioner at the Metropolitan Police, said it welcomed the "balance" struck in the HMIC report because it recognises that there is a threat from protest groups.

BBC: Call for undercover policing inquiry