I think that what's happened is that "Departs Terminal 5" has displaced the OW status information which would otherwise be there. I think I only used to see this on my longhauls ex-T1. But now every T5 flight seems to have this printed on the BP, despite the fact that almost every BA flight now departs from T5.

If BA find a reduced need to tell pax that their flight departs from T5, then we may see the OW status information showing again.

Or maybe it might just be possible to re-program the system to print two lines of information there?