This is the website I got my information from:
http://www.rcaf.com/aircraft/fighter...e/versions.php
The text on the Mk X includes the following:
"After 166 Merlin III powered Hurricanes were produced, production was switched to the Mk X, the designation used to identify Hurricanes powered by the American manufactured Packard Merlin 28 powerplant. All 434 Hurricane Mk Is were built to British contracts, with twenty-five being taken over by the RCAF, and given Canadian serials."
Hence my question about what RAF serial numbers produced by CCF had Merlin III engines.
Regards,
Neil