Many people have wondered about that. It is believed that the bombmaker in the first group has been snagged (in Pakistan, IIRC), so possibly these were simply wannabe's egged on by the local mullah. However, if they had at least the basic concept, they were perhaps a little closer than that - but obviously had not been trained. If it's true that one guy threw his backpack into the train and then tried to escape, I'd say they've dropped to second or third or fourth tier.
But even a low-level attack can still kill, and I think the British gov is being nonsensical in minimizing this. Have the Brits now decided that it's going to be okay to just terrorize them, make them lose under 3000 (obviously the new threshold) people every now and then, and then just buckle their bomb-proof vests closer?
My question: why do Western nations think this is an okay way to live?
My answer: we don't!!! . . .These Basturds are not going to get away with this!!!