Short S.21 Maia
The launch ship for the Short Mayo Composite air-launch flying boat combination.
Developed simultaneously with the Empire flying boats, but the sole S.21 was basically an S.23 Empire C modified for the carriage of the Mercury. With the Composite project rendered obsolete, the Maia was refitted to Empire C standard and used by Imperial Airways until destroyed by German bombers in 1941.
Corrected labelling