Should anyone be interested I have my fathers logbook and photos from his time in Malta. He was Flt Frank Bastard DFM and was an Observer/Navigator and Cameraman for the PR Flight 431 (later 69 Squadron) on Malta during the siege. He mainly flew with Warburton as well as several others pilots and recieved his DFM for flying the aircraft when his pilot was badly wounded.
Please feel free to contact me on kmb_keith@hotmail.com should you want any further information.