Any way to identify a Spitfire Squadron?

[tcolvin]

On Thursday March 1, 1945, at 1815 hrs, the journalist and writer, RW Thompson, was with 3 British Infantry Division (in Horrocks' XXX Corps, in Crerar's 1 Canadian Army) outside Kervenheim recording the battle for Kemsley Newspapers.
His article, 'Diary of a Battle, Kervenheim', was subsequently published in his book, 'Men Under Fire'.
He observed, "The Spitfires flying the last sorties of the day hurl their bombs 400 yards ahead".
I need to identify the Spitfire Squadron involved, and have checked every ORB in the National Archives - not all of them, by the way, exist - without success.
Does anyone know of any other way of identifying the squadron involved that evening?
Tony