In message , at 13:20:29 on
Thu, 22 Sep 2016, Recliner remarked:
as a premium service - this was during the era when occasionally they would
fly concord on this route

Eh?? Was the concord maintenance base in manchester or something?

Filton, more likely.

No, I don't think the BA Concordes were maintained at Filton. You
could see them parked at the Heathrow hangars (where one still lives).

Not for routine maintenance, but there indications that Filton was where
major spares were kept, and perhaps the aircraft flew there rather than
the spares being flown to Heathrow.
--
Roland Perry