1. ban encryption (any encryption worth its salt)
2. ban anything psychoactive
3. detach us from the European Convention of Human Rights.
They're rapidly arriving at fascism. The public seems listlessly along for the ride, as usual.
While I get that it's not what you mean, I believe most of the world bans certain type of pornography - namely child pornography? (Although the world doesn't agree on what a "child" is in terms of age).
I'm not sure it's controversial to ban some forms of expressions that are considered to be more or less universally only possible by harming the innocent (see also: bestiality).
Personally I have an issue with possession of data being a crime, as it is such a dicey proposition when it comes to planting evidence etc. But I don't have any problem with it being illegal to eg: manufacture child pornography.
Which ones? The only one I'm aware of is revenge porn (with intent to cause distress).
P.S. as I understand it 3 if achieved means that they either have to pass new almost identical legislation compatible with the UN convention on human rights or the UK would be in breach of our UN commitments...