[Stooky Bill]

Though watching the videos that have in the past been posted of Channel 4 at midnight (they had a Big Breakfast special), there doesn't seem to be any sort of glitch or anything to suggest them switching over to a new system- maybe they did that during the closedown to avoid potentially affecting programmes?

ETP1 also vanished from Channel 4 at the same time, I assume that was down to the changes as well, and so did 4-Tel On View on view for 6 months, so closedown was just a caption stating when the first programme was starting until 4 Tel On View returned in July 93 (though I recently saw an example of the same caption from some time in 1994 as well- and it must be from 1994 at least as the closedown had the new design of clock that came in that year).

I was watching Channel 4 that night and there was a lot of visual disturbance around midnight. But then I was watching in London so even if it was done after closedown there was still a lot of switching going on because of the changes to ITV.

I was keeping half an eye on teletext and there was a glitch to the vision slightly after midnight that coincided with that appearing. That was added at transmitters themselves so would vary depending on where you were