One of tomorrow’s Drama repeats is the episode originally shown on New Years Eve 1987, and was scheduled 23:30-00:05. The live chimes of Big Ben and a BBC1 continuity announcer saying Happy New Year were incorporated into the episode, as seen here:
I assume the master copy of the episode was in two parts - the first part ending when Den turned on the TV (after which the BBC switched to a feed of the live chimes) and the second part showing the characters singing Auld Lang Syne and the end credits. Presumably there was a period of black on the tape and a countdown clock into “part two”, and the BBC switched back to the EastEnders tape after the chimes/announcement.
I haven’t seen any repeats of this episode, but I doubt they will include the live chimes and BBC “Happy New Year” announcement as this wasn’t really part of the episode. It’s possible the whole tx was recorded and archived, but I don’t think a minute of chimes etc would really be appropriate for repeat broadcasts. Maybe two versions of the episode were post produced, the latter having a more appropriate transition between the two “parts”, and this version was used for archive/repeats and overseas sales.
It will be interesting to see what happens tomorrow on the Drama episode!
BTW, I’m told that the Big Ben chimes that ended up being shown that night weren’t actually live as some technical fault meant the feed was lost, and the BBC showed a back-up recording. This still involved switching between the sources of course. And the public were none the wiser. The whole idea was quite progressive for 1987, I would say, and was pretty effective on air.