As Mike W says this is an industry wide global telecommunications problem caused by the introduction of internet telephony which allows people to spoof any telephone number. It is being worked on - there's some new protocols being implemented (SHAKEN and STIR 🙂) but implementastion by the FCC (in the US) and Ofcom (UK) is slow and needs international cooperation, so other solutions are being looked at.
I don't see the situation getting better in the short term because as Openreach and others rollout fibre to the home all our fixed line telephones will be replaced with internet phone (VoIP, Voice over Internef Protocols) services provided by our ISPs during the next decade or so. Although it would be fraud or probably an offence under the Computer Misuse Act, and ISPs will put controls in place to stop it, I'm sure some "script kiddies" and local criminals will work out ways for spoofing using these new services ...
Sorry, if this is more detailed than anyone wants, and apologies in advance to Mike W as I'm not fully up to speed in this area these days. Some additional reading for those with insomnia!
In the meantime just don't trust any phone calls ...
https://warwick.ac.uk/newsandevents/pressreleases/new_ways_to/
https://www.dwt.com/insights/2020/10/fcc-stir-shaken-robocall-mitigation-plan-deadline
https://www.ispreview.co.uk/index.php/2019/04/swapping-to-broadband-voip-from-a-uk-copper-home-phone-line.html
Michael Ixer ● 1898d