British Bombers In Iran?

Iran accuses Britain of involving in bomb blasts

I'm trying to decide whether or not to take Iran's accusations seriously or not. On one hand, the Iranian government will do just about anything to blame a Western government for its internal problems; so any accusations of malfeasance are automatically suspect. On the other, would it surprise me to learn that the British would be doing everything it can to encourage instability in what is arguably the world's most dangerous country? Not really...

For now I'm going to come down on the side of the Brits not having been involved simply because the diplomatic risks of getting caught trying to pull it off are so high.