the only way I can see this actually having some effect is for the UK government, as stated before on behalf of the online safety act, create an intranet where the entire internet backbone is completely cut off, and the UK would be a closed network, thereby making the UK airgapped and safe from any outside attackers, but there are, of course, several problems with this.
it's not safe from the people on the inside of the UKs network. it would be heavily fucking censored. you wouldn't even be able to use a VPN, which means people like @alexchapman would unfortunately no longer be able to post on here, and...that would of course, bring up civel rights problems moving forward. I think the UK personally should faze out digital DI, or, at the very least, listen to the information assurance team they hired to
protect this infrastructure. because if implemented, and I guess it kinda is already, it can be considered critical infrastructure...