As it cam around the curve from Wandsworth I could see the familiar shape of a Gresley A4, streamlined curves and shining blue paint. It was Bittern again, in its current guise as Dominion of New Zealand. This time I moved down the bridge a bit, looking to get a different view of the train - and perhaps glimpse its red driving wheels.
There's something special about an A4 at steam...
And there they are! The red wheels!
Looking at this picture I think I found a good spot, and a good angle that shows off Bittern's streamlined curves, reflections in its shining blue paint finish.
Out from under the footbridge and the locomotive is shrouded by steam and smoke.
And then it was gone, off through the station and down to the coast.
Somewhere in my head there's a small boy, standing on a bridge watching the trains.