A small Island with a smaller population? England is one of the most densely packed countries on the planet, oh we may not have even nearly as large a population as America, but for the amount of land we have it's impressive.
And as for saving our arses (yes arses) in World War II, yes I suppose you did, although to be fair it would have been very hard for Hitler to take our little Island, and without us their as a landing point and base of operations, you would have found it very hard to win the war. And the UK still had a very large part to play in the war, and the Blitz was terrible, their was one ONE bombing raid on American Soil (I mean america, not Pearl harbour or somewher like that), while tens of thousands of people died in their beds or in their homes due to the bombing. Thanks for helping us, and for waiting untill you where actually attackted to do something about it.
And as for laws to be brought in times of crisis the nearest thing would be DORA (Defense of the Realm Act) taken in WWII, and yes that gave a huge amount of power to the government, but if you think that the current terroist threat is anything on the scale of the Second World War you may have to rethink it. Now their are laws trying to be passed to allow terroist suspects to be imprisoned without trial, not giving evidence, and to monitor their phones and internet access while still free, but all intelligant people are opposining this.
As for the people in charge of our government, don't bother yourself, there usualy incompetant and make bizare decisions without the excuse of light corruption, rocked by scandle every week by are accursed thrill media of "The Sun" and the "Daily Mirror" owned by capitalist, poiliticly minded Murdock. It's depreessing, and it's not getting better. Worse we have a leader who seems to be devoted to liking the boots of W. Bush, and would like agree to turn Britain into a state of America if asked.