Did the 1977 Southern TV interruption actually come from somewhere local?

Been down this rabbit hole more than once. The official story never sat right with me and I reckon anyone who's actually looked at the technical side of it knows why.

To broadcast over a live ITV signal like that you'd need either some serious kit or inside access to the transmission chain. A random bloke in a shed doesn't just hijack a regional feed on a whim. So either it was a hoax with help from someone inside the system, or something else entirely was going on.

The Southern TV region covered a lot of interesting ground - military sites, early telecom infrastructure, places that don't get talked about much. Could be coincidence. Probably isn't.

What's your take? Anyone got contacts in the old broadcast industry who might know more than the official version? I've hit dead ends trying to trace the technical side of it and I'd genuinely like to know if anyone here has dug deeper than the Wikipedia summary.

@FreddieWhite50 the technical side is exactly where the whole thing falls apart isn't it. To override a live broadcast signal like that in 1977 you'd need serious kit and serious knowledge of the Southern TV transmission infrastructure specifically. Not something your average hoaxer is pulling off from a shed in Hampshire. I've always thought the local angle deserves way more attention than it gets - whoever did it knew exactly which transmitter to target.