Marbles,
A little more info on your Fokker XXII:
It was an ex KLM machine with the name 'Roerdomp' (Bittern) and was acquired by British American Air Services in 1939.
In 1941 it was impressed into the RAF and operated by the Air Observers Navigation School.
After that, it served with 1680 Flight, Abbotsinch, where it was re-named 'Sylvia Scarlet'.
It was lost on July 3rd 1943 when it suffered an in-flight fire and crashed into Loch Tarbot with the loss of all on board.