It's unfortunately no longer enough to force websites to check your government-issued ID before you can access certain content, because politicians have now discovered that people are using Virtual Private Networks (VPNs) to protect their privacy and bypass these invasive laws. Their solution? Entirely ban the use of VPNs.
So how I see this will be implemented in the UK is that your work vpn endpoints will need to be registered with ofcom.
The big providers like proton or Nord will have to declare their endpoints if they want to remain compliant.
All the smaller providers will just skirt detection for quite some time, eventually they will crackdown on them, if Sky can manage a slow but steady block so can Ofcom. No they will never get anybody but that was never ever the intent, just to get most.
The main aim will be to use using an unauthorised VPN as a means to further smear people and confiscate their equipment, you have to have reasonable grounds in the UK.
Its never been about criminals or pedos, most already use other means to secure themselves.