I have been looking at the schedule and there lot of other programme, radio, BBC4 and if there do menus for Sitcom season and Music then it would stand to reason it would want to promote the other programmes.
The specially adapted
Sign
ident was shown by all Nations, in addition to Network. Northern Ireland's use of their centralized boxless logo looked most pleasing to the eye, as per normal:
*snip*
Just noticed, the colours of the filaments are different compared to the Network copy I posted earlier on this page.
The network version is also fuzzier and slightly stretched in comparison. Video to demonstrate.