So the linked articles in actual post office electrical engineering journals from the time, over several decades, including detailed calculations and implementation details were also fake?

Plus they managed to somehow infiltrate a fake freedom of information request detailing a BBC application for a warrant based on TV detection, and internal documents detailing the operation of the relevant department and its legal basis of operation, into the whatdotheyknow FOI requests archive?

It seems unlikely, especially for varied forms of evidence over such a long period.