I took these pictures on 8 May of this year at the 
Bussum Bridgehead 2006 event. The English owner told me this is an Irish Army gun tractor version of the Morris-Commercial CDSW. It was in use well beyond the end of WW2, towing an 18/25 pdr gun.
If anyone can add some more information about this rare variant of a rare vehicle, please do so!
 
 
To see all the pictures, go to my 
G503 album.