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G-BIOO is an Unicorn UE-2B hot air balloon, built in 1981 and registered in the UK. No public sightings of G-BIOO have been logged yet. There is one photograph of it in the archive.
Also written G BIOO or GBIOO.
UK civil aircraft register, 6 Sep 2026
First photographed here by G-Dash.co.uk on 7 September 2026.
