Have a go at this: a selection of the questions asked of immigrants seeking UK citizenship. I am ashamed to admit that, despite my addiction to news, politics, history and culture, I only managed 18 out of 24 (wrong on 8, 9, 10, 14, 18 and 24). Thankfully, my Irish passport means you can't get rid of me. Mwahhahahahahahahahaha etc. I wonder how UK citizens would fare.
Post your scores in the comments box.