I've just finished reading this book (
The Baghdad Air Mail by W/Cdr Roderic Hill ISBN 9781845880095) a contemporary account of the service which operated between Cairo and Baghdad in the mid-twenties. It seems from reading the book that the aircraft used by 45 Squadron were Vickers Vimy and (mainly) Vickers Vernon aircraft (which I understand was a variant of the Vimy). The cover of the book however shows an aircraft which is clearly not a biplane (so not a Vimy or a Vernon) and I wondered if any of the experts here could identify it?
Apart from the interesting story recounted by the then W/Cdr Hill (later ACM Sir Roderic Hill KCB, MC, AFC*), the book also contains references to a number of RAF officers who achieved fame and honours in later life - Flt Lt Basil Embry, Sqd Ldr Arthur Harris, Sqd Ldr John D'Albiac, Sqd Ldr James Robb, Sqd Ldr Robert Saundby and others.