The complexities of the London Underground and transport system make it difficult for foreigners to understand, thank goodness. Therefore it seems likely that any terrorist strikes would be by people living in the UK.

I don't know how many there are who are prepared to blow themselves up in the cause of total delusion but I'd guess that this is the weakest link in the terrorist network. I'm sure that there are many extremists overseas who would be happy to arrange attacks if they had willing mules. These people have no qualms whatsoever about launching attacks even worse in terror, frequency and magnitude than Canary Wharf or Enniskillen. The attack on the World Trade Centre comes to mind.

For once I'm glad that Blair & co. are in charge of our defence rather than people who rely on the truth of a theory put forward by a BBC documentary. That would really give me nightmares.

Regards

Steve