Well, the standouts for me have to be the London bombings and the London Olympic bid...and of course all the natural disasters. Closer to home, my city was hit by two tornadoes in quick succesion, and even one is very rare in the UK. The first wrecked most of the houses a street away from where I live. I was far away at the time, though.
Top Google searches for 2005: http://www.google.com/intl/en/press/zeitgeist2005.html
New technique developed for decyphering papyri and other texts from Ancient History!
In Canada, The speaker of the house casted a tie breaking vote for a confidence motion, and prevented us from going into an election. First time that ever happened. Heck, I do not think that's ever happened the UK either, and they pretty much have the same basic goverment structure we do.