The UK does not have anything like the Chinese firewall. It's a voluntary system that applies only to consumer-level ISPs and the cleanfeed list is managed by an NGO.
However, I am disappointed that the g'ment is actively trying to force all ISPs to implement the filter system.
Question: when does a consumer ISP end and a bandwidth provider begin?
And it's a NGO with no responsibility to report to anyone on effectiveness or indeed what they're blocking - the cleanfeed list is secret. And if you don't think that the government can influence them, well, I have some land I'd like to sell you.
And the IWF's charity status is dubious at best considering they get government funding.