Pushing the envelope

I used a version of this photo yesterday. It was taken on a long lens and now I have enlarged it as far as I can. There are just enough pixels left I hope. I got a lovely letter the other day from a museum curator at Summerlee, an industrial heritage museum in Lanarkshire .They have the only original remaining Blue Train carriages in existance. I enquired about their restoration project and a man called Justin sent me  an enthusiastic and informative reply. He even invited me to see the carriages which are not currently on publc display. Isn't that nice? Below is a link to the famous Cueno poster promoting the Blue Trains.
https://www.originalrailwayposters.co.uk/product/glasgow-electric-blue-train_cuneo