UK ISPs block Pirate Bay proxy sites
Found on BBC News on Wednesday, 11 March 2015

"Under existing BPI blocking orders relating to 63 illegal websites, ISPs are required to block the illegal sites themselves, and proxies and proxy aggregators whose sole or predominant purpose is to give access to the illegal sites," according to the BPI.
"To block a site that simply links to another site just shows the level of censorship we are allowing ISPs to get away with," he said.
Like this is going to help. If it's DNS based censorship, users just need to switch to uncensored DNS servers instead.