Carolyn
The Madrid bombing showed that terror can turn citizens against their own government and make them effectively, if not intentionally, pro-terrorist.
Bombing Chatham Hose would only make sense if Muslims were trying to punish past offenses, but they aren't.
They are trying to tell the British public that their government cannot defend them from terrorism and that the only way to safety is to give Islamic terror carte blanche abroad.
That's the purpose of the bombing - the Muslims are hoping that the British are made of no sterner stuff than the cowardly Spaniards.
As I said on another thread: