Yes, they announced that the 10 O Clock news was to go ahead in 2 weeks time on the 2nd October - the very day BBC News went widescreen. So the 9 O Clock news titles were only ever seen in widescreen for two weeks.
IIRC they went widescreen the day Breakfast started (*not* Breakfast 24 which was shown in the 5 days between the last Breaskfast News and the first Breakfast) and I don't remember it being the 10 o' clock news at this time. No, two weeks later is right i think
If that's the case, then I take back my comments, I think you are right, as this is the case with UKTV isn't it, making idents in 16:9, only to give digital viewers a 4:3 version of it!