Putting the burden on site operators to geoblock UK users is not only placing an incredible burden on individual operators, it doesn't even work.
It is not the responsibility of foreign companies to enforce or even acknowledged the UK's laws. If the UK has a problem, they have tools to solve it on their own soil. If they want to enforce their laws they need to pay for it.
The UK is trying to bully and scare foreign website operators regardless of scale or type of business into paying to enforce UK laws outside of the UK.
If they want a website blocked, the only way to make that work is to block it and pay for it themselves.
It is not the responsibility of foreign companies to enforce or even acknowledged the UK's laws. If the UK has a problem, they have tools to solve it on their own soil. If they want to enforce their laws they need to pay for it.
The UK is trying to bully and scare foreign website operators regardless of scale or type of business into paying to enforce UK laws outside of the UK.
If they want a website blocked, the only way to make that work is to block it and pay for it themselves.