Well, in theory, yes they could see what you watching (no great stretch, as Britain only had a few channels to choose from at the time), via TEMPEST techniques.

Well, in theory, yes they could see what you watching (no great stretch, as Britain only had a few channels to choose from at the time), via TEMPEST techniques. https://en.wikipedia.org/wiki/Tempest_(codename) https://en.wikipedia.org/wiki/Tempest_(codename)