Yes, that was when BBC 1 had two separate playout arrangements (for England) one for the digital platforms, the other for analogue. The idea was that the platforms could have tailored announcements and trailers, for instance BBC Choice being plugged on digital but not analogue, but I don't think anything beyond the UK Today junction was ever routinely different?
As well as different trails, pointers and announcements they also often ran different versions of films - analogue showing a 4:3 pan and scan copy, and digital showing a widescreen copy*
I do recall flicking around and seeing Choice promos often being dropped in when One/Two were being promoted on analogue, so it was done. Whether it was worth it or not...
Worth remembering that it was also used to promote digital to analogue viewers too. No point doing that to those who already had it
There was more to it than just split promotions, the technology used in the digital tx area was newer and the established TX area (which wasn't that old at the time) was more resilient so they didn't really trust it to run the two main networks straight away. Plus the issues concerning how to do two different ratios and switching between them took a while to work out how to do from one suite. It was the BBC being a bit cautious basically.
*I remember one film on BBC1 whereby the widescreen version was presumably derived from the 4:3 version ... so digital viewers saw less picture