According to ESRB, this game contains: Cartoon Violence
Parents should feel completely comfortable allowing their children to play this game. It's fun, harmless, and features the British accents they find so entertaining.
People without good televisions beware: this is the first PS2 game I've ever played that actually needs to be played on a large television with composite video—played on a normal (23") television the game's text is too tiny and blurry to read, and some of the smaller visual details, like whether a lock is open or closed, can be very hard to see.
Deaf and hard of hearing gamers will be okay— everything important is subtitled, and a handy onscreen radar and comprehensive map ensure that they'll always be able to find the baddies.