Well that explains a lot. I have had a carrier which appears on (eg.) 14.060 every time I transmit there. I have to go up to 14.0604 to get away from it. Its been there for 2-3 years, maybe more.
I also get a comb pattern on the screen when I plug in the PC to the KX3 on all bands, and assumed that was perhaps an artefact from the radio rather than interference. No way can I sell up and move out, and am not a member of the RSGB. Nor do I have the equipment to measure and display or save evidence (as far as I know...)
But believe me its a problem, and a pain, and will not get better by the phone/internet companies doing anything, unless they're forced to act.