Thanks for pointing me in the right direction, Alan, The Quiet Lane should have been my first port of call, sorry John Hardy
The photograph of the crash site is a useful comparison with my 1908 photo.
As far as the friendly fire issue is concerned, there is a write up on 49 Squadron's Roll of Honour for Sgt Potts, see
http://www.49squadron.co.uk/Roll%20o.../Potts_SH.html It is not clear from that whether this particular bomber crashed from lack of fuel or whether it had also been hit by a Spitfire, probably the former.