[Adriano Baumgartner]

Hello Andy!
Actually I do know about the Special Service Flight ( F/L Gallieni and the fight agains Erich Sommer, etc...)
I actually came around this designation: Strat Recce U
The pilots who flew with this Unit include:
1-Lt Henry Hugh Smithers, DFC ( RAFV 103243 )
2-F/O John Gower Martin Hooper, DFC ( RAFVR 89778 )
3-P/O Edward Charles Leonard Cordy, DFC ( RAFVR 102543 )

I really do not know IF they flew with the Sub Stratosphere Flight, or IF this was another unit ( in North Africa, maybe ? ). I do know they were both awarded the DFC on 12 May 1942...so perhaps from the High Altitude Flight, as you mentioned.

Do you ever heard about them? ( That unit could be the same known as X Flight Egypt ? )

Yours

Adriano