My sepia photo: "The Four Generations"

I know that most people like to have lots of family photo's scattered around their homes, but I have to admit that I don't.  Perhaps it's because I have just the one which is far more meaningful to me than any collection ever could be.  It's known in our family as "The Four Generations".   

This is actually a scan of my own copy of the original, but as far as I know my elder sister still has the actual original photo as taken by the photographer.

On the left is my grandfather, on the right is my father, and seated is my great-grandfather with my elder sister as a baby on his lap.  That's four direct descendants in one photo.

I seem to remember being told it was taken in Argent's Mead, Hinckley, Leics.  It would have been in late 1948 but I don't know what the occasion was.