Gentlemen
On January 26, 1949, 8 Seafires and 8 Fireflys from the HMS Triumph operated off of the USS Philippine Sea during a cross-operating exercise. The HMS Triumph operated a similar number of USN Corsairs and Bearcats. (source: The Seafire by David Brown, pg 138)
A quick scan of the book did not reveal any other instances.
Eagledad