Or, y'know, disable your filter. Sky's configuration panel is here - https://broadbandshield.sky.com/ - O2's, iirc, requires you to go to an O2 shop with your ID.
Heh, small world. I work for Sky, and my team very recently took over technical responsibility for that exact site. Nevertheless, it's worth knowing that outside the big 4, there are ISPs which on principle don't even require that step. People can fall into the trap of believing that all UK consumer internet access has a ThinkOfTheChildren filter in place by default, but that's just not true.
Sure, AAISP don't even provide a filter iirc, though are a lot more expensive than some of the more mainstream ISPs. I think Zen Internet don't either, but again, expensive.
