Just an observation on spelling errors in case others get confused. In 2nd paragraph, I am fairly certain that spelling of the aerodrome stated to be Hibbiyana should be investigated! In last paragraph, first sentence, I think "would" should be "wound".
My understanding is that the main aircraft on strength at 4 FTS were Oxfords and Gordons, plus (I think) Audaxes. Despite the wording in 4th paragraph, I cannot imagine any commander ordering a troop carrier aircraft be scrambled to attack fighters such as Gladiators - an Audax might have a chance, but that also might be a stretch. Also had not heard of Gladiators (presume RAF ones) being captured at this time in Iraq, but guess that would be possible.