This discussion really reminds me of the book Brave New World by Aldous Huxley in terms of how sexuality was described in that book as well as it's effect on people.
Secondarily it's a rather silly topic that the UK would want to ban porn - Surely if they were serious they'd call the GCHQ to prosecute/arrest/force shutdown all of these providers in the UK or even internationally as they don't appear to show much respect for international law or rights anyway..
From a more serious perspective, I see it more as a smokescreen as part of the entire surveillance-police state system of trying to normalize the idea of further policing the internet or to give some seemingly acceptable reason to incrementally go after any website that posts unsanctioned or unapproved information, in the future.
As such I don't see porn websites of any kind, perhaps except those that perhaps would compete with 'chosen' or 'preferred' suppliers, being censored or forced to shut down. It is very likely that planted/mild porn content on said unapproved information outlets would be used to shut them down.