Llademos, actually BA do use T2 at CDG. They moved into it last year while T1 was refurbished. Shame - I'd come to like Satellite 5 for all its quirks.
As for this stunt... Good on BA! For once taking the positive initiative. BA invests (spends) money all the time (have you any idea of the spend on IM for a start?.. It's not far off 3/4 of a million pounds a day) and to my mind this is just one of them.
I hadn't been to LGW for a while and was amazed by this bridge. It's a great feat of engineering - and dare I say more impressive than the T5 roof for now).
Isn't a bridge of this size across a taxi-way a world-first?