The First Spitfire on Floats?
"Nobody's Child" It floated but never flew.

Early in 1940 Supermarine was asked to convert a Mark I Spitfire for use on floats, since it was anticipated that Germany would invade Norway and a fighter seaplane would be needed. The floats were taken from Blackburn Roc production, since there was no time to design floats specifically for the Spitfire. R6722 was delivered to Folland Aircraft for conversion "painted in the normal day fighter camouflage, including the under surface scheme of black and white." After conversion, water tests showed the aircraft was very unstable and it was never flown. It was sent back to Supermarine in May 1941 and converted to a Mark VA.