Hi Rob64UK,
A quote from
http://freespace.virgin.net/john.dell/blackburn_roc.htm
"In early 1940 it was decided to give a large part of the production run (33 aircraft) to the Finns, at the time fighting the Russians. Preparations went as far as painting the aircraft ready for delivery and collecting them together in Scotland for the flight. The end of the Finnish "Winter War" stopped delivery."
Regards,
Pentti