That is reassuring regarding the 'phones, but in any case I have always asked myself three questions:
1) Do the UK security services really have the time, ability and wish to track my 'phone use beyond whatever service-records might be kept anyway? (BT landline and a basic portable on PAYG)
(Probably not)
2) Am I doing anything or do I knowngly have any connections with villains, that might arouse enough suspicion?
(No)
3) Who would gain the more, and be the more worrying to me, from spying on me – the State or some wretched advertising-agency)
(The ad people.)
I started my working ;life as an apprentice with what was then called Post Office Telephones. We all had to sign the Official Secrets Act, and re-sign it on leaving, because every private phone call or written communication, even your blandest family exchanges, was accorded that level of privacy.
Further, although it was something in which I was never involved, telephone interception for the Police required very high-level permission indeed before the request could be made. (Not "tapping" please – that is either an Americanism in this context, or something we do to metal.)
Whether the huge US corporations who have taken over the Internet, or the Chinese spooks discovering it was Aunty Beth in Bognor's birthday yesterday, would be troubled by such niceties, is another matter. Let's be honest, a hell of a lot of those wedded to so-called "smart-'phones, eavesdroppers like Alexa and their Facebook accounts have such a low opinion of their own privacy and security, they can't really complain. No-one forced them to buy those or open a Facebook account.
Right, lunch-break over… I've a Bracket, Boiler-mounting, Mk3 (offside) to fabricate.