Step 2, demand compliance.
Step 3, upon not hearing of compliance, levy fines.
Step 4, upon non payment of fines, declare in breach of (2).
Step 5, block site from UK using DNS, in the same manner as torrent sites etc.
5 was always the goal, 2 to 4 are largely just performative.
The UK government has lost control of what happen in the physical world on their own island so now the bureaucrats play a fantasy game where they are gonna enforce their rules and dominion in their former colonies or the digital world.
From my anecdotal evidence, is that it's fucking stupid and hated
https://www.ipsos.com/en-uk/britons-back-online-safety-acts-...
"To what extent do you support or oppose the introduction of age verification checks to access platforms that may host content related to suicide, self-harm, eating disorders, and pornography"
is like asking me
"To what extent do you support the detainment of people suspected of theft"
and then concluding I support vigilante mobs dragging people out of their homes when I answer in the affirmative. The means IS the question - the sad meltdown we're all about to witness as the UK government realises their lack of jurisdiction is because the actor is wrong, not because the end is wrong.
The phrasing should be "To what extent do you support or oppose the British government enforcing the introduction of age verification checks to access platforms that may host content related to suicide, self-harm, eating disorders, and pornography"
Forcing major device manufacturers to implement these content blocks to a certain level of rigour is the obvious, enforceable, effective, minimally invasive way to achieve this entirely reasonable goal. I can believe that pornography consumption by preteens is not a good thing and that this implementation is stupid at the same time.