Hi Dave,
It's pretty hard to tell when the pictures might have been taken, the only guess i can make is based on the ladies' clothes in the second pic you posted (where I said I thought it was shortly after the war) and the fact that the war damage and trench architecture in other pictures is pretty fresh, so it can't be too long after the end of the war.
The Van Eyck statue dates from 1913.
If you could find out when the Dinant memorial was built you will have an earliest date when the photos could have been taken.
