Thanks to our Irish friends I've spent hours in a tube in London wondering whether a bomb had actually gone off somewhere but without any other information. I know people who were at their desks when various IRA bombs blew up near them and so on. Bombs just annoy us, and after Sept 11 and March 11, this wasn't exactly a surprise so there isn't the same shock that we felt on Sept 12th. Christopher Hitchens makes the point vey clearly.
Probably most of the population will behave as they did after the IRA bombs and just ignore them, which is, arguably, the most annoying result for the terrorist scum. If it continues then at some point though, we'll get angry enough to ignore the woolly head brigade and their "culpa nostra", not to mention the appeasers and the other useful idiots and go after the perpetrators and those who support them. History suggests that the result will not be pleasant because the English are remarkably keen to fight even in todays degenerate times - witness the football hooligans, the happy slappers and so on - and dislike religions that they think threaten the realm. The last religion to be persecuted systematically was catholicism, in the reign of the previous Elizabeth and the result was not good for the catholics.