An Air Nostrum Bombardier CRJ1000 (EC-OTG) in all-white livery on the apron, a staple of regional flying in Spain/Europe.

Passengers boarding a Vueling Airbus A320-214 (EC-MUM) under a cloudy sky at Barcelona airport after a bird strike aircraft change

The lack of airline branding suggests this aircraft may be in storage, awaiting new livery, or on wet/dry lease operation.

Aircraft registration EC-HYC is visible under the wing. Stairs and ground crew indicate a typical turnaround at a European airport.