Hi Alan,
I'm not sure this mystery is completely solved now

My bf is an aeroplane enthusiast and is having a deep think about this picture.
As far as the picture goes...
Yes it is a Wellington but in strange colours, there seems to be a hint of camouflage could it of been painted over? Post war used for alternative purpose maybe? BUT the gun turret is still in place.
There is a second picture also of 3 Wellingtons (nose end) the front one with a leggy redhead flashing her gams

The front gun perspex is removed though. (I'll get a scan of this somehow). There is also a picture in the same pack of a captured Messerschmitt.
Bf thinks the colours are the same or similar as the Mosquito? Where some Wellingtons used as training vehicles instead of Mosquitos?
The HZ serial number is the plane serial as the recognition code is much bigger writing further up the plane.
I'm going to speak to my mum about the DH connection as it might be a red herring.
All still confused here!
Pam

PS: Found some detail on HZ Wellingtons...
http://www.lostbombers.co.uk/bomber.php?id=1600