Swanage MPD ashpit, in this case.
Once the rostered engines finally leave the shed in the morning, the next job is to transfer (shovelfull by shovelfull) the ash in the pit to the ground alongside the ash wagon. Once there, it is shovelled into a wheelbarrow, dropped in a pile alongside the ash wagon and finally - thrown into the ash wagon.
I actually quite enjoy this task - it's really quite good exercise, and if you get your posture right it is far easier than you would expect.
It goes without saying that this photo was taken from a location which is not accessible to the public.