Important note for readers from the US: while the UK has a legal right to free speech (via the Human Rights Act, which in turn is based on the EU Convention on Human Rights), it is diluted by opt-out provisions for public health and safety, and undermined by other laws: notably the Obscene Publications Act (1958) -- although enforcement of the OPA against works of written fiction has collapsed in the past two decades -- and other anti-terrorism statutes which make it an offense to be "in possession of material likely to be of use in the commission of acts of terrorism" (or, more nebulously, inciting acts of terrorism).
Suppressing political discourse (even extremist political discourse) and using an anti-porn filter to do so is of course a horrible precedent to allow, but it's important to bear in mind that the UK has no equivalent of the solid US first amendment right to free speech.
Suppressing political discourse (even extremist political discourse) and using an anti-porn filter to do so is of course a horrible precedent to allow, but it's important to bear in mind that the UK has no equivalent of the solid US first amendment right to free speech.