The UK's porn filter has been up for what, maybe a week? And already they've started blocking political websites. The ones that have been blocked, though? Both Lib Dem and Conservative (Boris Johnson is a big name Con). Given that both these parties are in the government that set up this filter, and they are both targetted by it, the conclusions we can draw is that the technical people behind it either really don't want to be working on it, or are totally incompetent. No doubt we'll find out which soon enough.