Strewth Mate!,
I've got a couple on the shelf at home. I'll get you the details of the second one when I can...I can't remember the name right now.
The one I have in mind at the moment is called 'Memories of Hendon Aerodrome' and is published locally. It's a modest picture book and it's available from a company in Brent St called Memories.
Their number is:
0044 208 202 9080
Memories also hold a large number of photographs of the Aerodrome and are very helpful with this sort of thing.
The Royal Air Force Museum *may* be able to help (
http://www.rafmuseum.org.uk/hendon/c...hive/index.cfm).
Aerofilms at Borhamwood may be worth a shot, although as far as I’m aware, their archive only starts in 1918
(
http://www.simmonsaerofilms.com/aboutus.html)
Hope this helps