Thanks Tony for your reply.

I assume they wouldn’t sell because of political reasons. Correct me if I am wrong. Why did the uk gov’t then, approve the sale of T.IX’s by Vickers Supermarine to Ireland? Just curious about the logic of the decision.

The reason given to the Irish Government at the time (1946) was that they wished to distribute the MkIX’s to their former allies. The two seat Spitfires (Tr9’s) which were ordered in 1950 were supplied in 1951 and by that time the situation had changed considerably.
Regards
Tony K