The anti-congestion charge and pro-car website, So U Ken today carried a posting on it's message boards threatening Critical Mass in London:

"Direct action against the next Critical Mass demonstration in London is being planned.

If you are interested in helping us get these hippies off our streets contact MAD. You should have our details, if not leave a message below with a disposable hotmail address that we can contact you at."

Whilst this threa is most likely mindless right wing bullshit its worth as many people as possible turning up to CM on friday and having your witts about you on the ride.