When certain big network equipment companies (this was before Huawei cloned everything) responded to criticism for building the Great Firewall of China by saying they were only supplying off-the-shelf gear already in use in the West, they weren't lying.
The problem is how the UK cabinet is arranged and the politically powerful role of Home Secretary - where the job description is a license to dream up, campaign for, and implement the most effective means of "keeping the country safe". Quite unfortunate.
Long-term change would only be effected by having the role's description framed in the context of keeping the UK - and its freedoms - safe. It's a subtle change to the oath of office, but would hopefully prevent the recent abuses we've seen. Universal mass surveillance is fundamentally incompatible with our right to privacy.
http://www.liquisearch.com/internet_watch_foundation/history...
In general, in 7 years of living in the UK, it is definitely my observation that British people in general trust the government to do the right thing. They were not brought up with an ingrained distrust of authority like people from some other countries were - not everyone is happy with the government, but people in general belive that the law is the law and if something is illegal there is a good reason behind it and they don't need to get involved too much.
This level of political apathy and lack of interest in their own country is really shocking at times.
What surprises me more though is how people can be so confident that their data is safe with the government. There is a long list of failed IT projects and incompetent handling of computer security by public organisations.
Even if everything the government wants to do with our data was justified, there would still be a very valid concern about this data eventually ending up in the hands of organised criminals.
[1]: https://www.theguardian.com/world/2016/nov/19/extreme-survei...
[2]: https://www.theguardian.com/politics/2017/jun/06/theresa-may...