Today's hero: Mark Kennedy

The trial of six green campaigners has collapsed after an undercover policeman who had infiltrated their group offered to give evidence on their behalf.

via BBC News – Trial collapses after undercover officer changes sides.

What a dude! Goes in to find out if anything bad is going on, does his job, a few protests get slightly derailed, then comes out*, changes sides, and busts the Met for entrapment.

* Ok so he was rumbled, rather than doing it voluntarily, but now he’s doing the right thing, and that’s impressive. Way to go Mark!