Hello,
Currently on ebay is a photo of Martinsyde G.105 'Elephant' A1581 AT:
https://www.ebay.co.uk/itm/SMALL-AND...UAAOSwJp1eqVfH
So given that the aircraft is not an Avro 504K as indicated by the seller, presumably it is not necessarily shown on a rainy day in Spain (whether on the plain or not) either. The usually helpful Air Britain site at
http://airhistory.org.uk/rfc/aircraft.html doesn't have much on this aircraft either. So does anyone know who operated A1581 and perhaps where the photo was taken?
Regards,
Clint