Maybe they expected it would be a QR aircraft (like it was the other day)
There is a strike on so I'd give them a bit of leeway
Originally Posted by
dakaix
BA782 (LHR-ARN) is, at time of writing, due to be operated by G-EUXI. G-EUXI did indeed operate BA546/547 to FCO. However the aircraft was over an hour late leaving FCO, and in-fact only landed back at Heathrow at 17:34L. This then allows a fairly leisurely 1 hour turnaround before BA782's new departure time of 18:27L.
Source: FlightRadar24.
In this particular case the information they've given to you does indeed appear to be accurate.
I think his point is that the scheduled arrival time of the Rome flight is only 5 minutes before the scheduled departure of the Stockholm flight, so it can't have been the originally intended aircraft