This is a repaint for the Flight Replicas Spitfire Mk.V as Mk.VB BM597 / G-MKVB, formerly of the Historic Aircraft Collection at Duxford and once a frequent flyer from there.
BM597 was part of a deal in 1989 between the RAF and Historic Flying Ltd that saw five Spitfire 'Gate Guards' replaced with fibreglass replicas and saved for restoration. It was another eight years before '597 flew from Audley End as part of the Historic Aircraft Collection. Full story at https://www.aircraftrestorationcompany.com/spitfire-bm597.
INSTALLATION
Unzip the download, copy the 'FJ_SpitfireV_BM597' folder into your MSFS 'Community' folder and you should be good to go. Repaint by Steve Mercer based on the paint kit and textures by Flight Replicas.