Its not just the UK that does this.

I have yet to see any through PP on my own, but many with credit cards, and we use the AVS mismatch with our merchant (authorize.net) but when people are getting card lists online from some script kiddie on a irc server, more than likely they will have the CV, so keeping extra eyes on orders coming in with the log from another country, and the CC from this one is the best bet so far I can think of.