For what it's worth, as a Brit, I assure you no one cares about this, and it's likely that most people, if asked, would support it.
The UK doesn't value liberty for liberty's sake like the US does. In the US there seems to be this notion that freedom is a universal good, where as in the UK people are quite comfortable with liberties being revoked if it means they feel safer or fewer people are doing things they don't like.
UK political debate today largely just consists of debates about what to ban next – loud fireworks, energy drinks, smoking, gambling, porn, not wearing headphones on public transport, praying for people having abortions, etc.
While this tech will obviously be used to clamp down on protests that are inconvenient to the government (as we've seen happen with protests in recent UK history), even these measures tend to be popular in the UK. Most protest groups are net-unpopular, therefore any movement the government makes to crack down on say Palestine protests, climate protests or immigration protests, are fairly popular here.
Imo the UK was accidentally a liberal country post-WWII to the early 1990s because of influence from the US, but culturally the UK isn't liberal and never was. We're a very socially conservative country and take a natural dislike to anyone who rocks the boat a little.
These new digital surveillance techniques are very much in line with British cultural conservatism, and follow a long history of UK mass surveillance.
As a Brit who inhabits the US desire for freedom I genuinely struggle to relate to Brits and it always makes me feel less insane when I come on here and find other people who value liberty too. But in my real life, I think I've genuinely only ever met one Brit who has shared my desire for freedom.