At the end of that walk along the river with GodDaughter 2, the one when I took this photo, and these photos, I also took these photos:
This was Surrey Docks Farm. As you can see in a couple of the above photos (most clearly in 4.3), Surrey Docks Farm has (of course (this is the twenty first century)) its own website.
We were on the path beside the river, getting a bit bored with the sameness of it all, getting a bit tired, knowing that we would soon be done, and then suddenly we found ourselves wandering around in a farm. There were no humans to be seen, just farm animals. The sheep in particular seemed really glad to see us, and stayed to have their heads scratched even after it had become clear that we had brought no food with us.