Hi Adam and Bruce,
I can confirm that it was F/Lt. Beatson, who was leading six Spitfires on a bombing sweep between 17:35 and 19:35. They were to bomb a petrol or ammunition dump in the Scutari area. Adam, I'll send you more details via email (this shows I should check all the sources before concluding anything!).
Cheers,
Andrew A.
Air War Publications -
www.airwarpublications.com/earticles