The history of 331 and 332 Sqn. is now being documented in detail by Cato Guhnfeldt. Six volumes are planned. So far three have been published (360-400 pages each).
http://www.kelkoo.no/c-100801-boker-.../spitfire+saga
This does not answer your question though. But I guess it will be found in Vol.5.
Nils