G-OSST Hot Air Balloon

G-OSST is a Thunder AND Colt Colt 77A hot air balloon, built in 1985 and registered in the UK. No public sightings of G-OSST have been logged yet. There is one photograph of it in the archive.

Also written G OSST or GOSST.

First photographed here by G-Dash.co.uk on 7 September 2026.