We were discussing it on another board, and I had a look at my house, and I was in the garden building my pond.
We also deduced the photos were taken in the summer of 2003.
That may not be the case in your area, but I would think most of the country was taken around the same time.
The car in front of the house is a Rover SD1 which I owned for a few months of 2003, and the black one is a Citreon Xantia.
I'm at the point of the red arrow, the pond outline is marked in yellow.
Here's without the markings.
Are you in any pics?
http://maps.google.co.uk/