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G-BSOP is a Cameron MARSHMALLOW-105 hot air balloon, built in 1990 and registered in the UK. No public sightings of G-BSOP have been logged yet. There is one photograph of it in the archive.
Also written G BSOP or GBSOP.
UK civil aircraft register, 6 Sep 2026
First photographed here by Chris Lane on 7 September 2026.