Am able (on Sky) to access all the sites mentioned on this article.
I do however, strongly disagree with the sentiment that this filter is "Just another attempt by the Tories to prevent people finding out information." It's not, it's just a very poorly implemented filter by the ISP's that can be 'hacked' with a simple proxy.
We had to deal with this kind of filtering many years ago back at school, where even the word 'mobile' was filtered.
This is not the new uk gov porn filter. It is an optional fter, like any other net nanny filter or any enterprise style filter. It's restrictive because that's what those kinds of filters do. It is purely optional, and supposedly granular so the user could just block search engines but nothing else.
This is different to the proposed uk gov porn filter.