United colours of steam locomotives

I had a lovely afternoon in the company of a work Associate, David. We decided that we would work away from the office so took a trip to the Bluebell Railway and worked in the third class carriage on the journey between Sheffield Park and East Grinstead. On our return we had a quick butcher's in the loco sheds and David pointed out the reflection of the sun from the side tanks of the locos to the side walls of the loco shed - blip done!