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G-ISTT is a Thunder AX8-84 hot air balloon, built in 1990 and registered in the UK. No public sightings of G-ISTT have been logged yet. There is one photograph of it in the archive.
Also written G ISTT or GISTT.
UK civil aircraft register, 7 Sep 2026
First photographed here by Andrew Garrett on 7 September 2026.