I lived in the area when they made the video.
It’s a private train line with old steam engines. The several trains had cartoon faces on the front, the cartoon faces were from a popular kids show with steam trains that had talking faces on the front of each train.
Queen modified one train for the video.
Sometime following the filming of the video I took a walk in to the train yard. The Miracle Express logo wood panel leaning against the wall.
I asked whether they were disposing I’d it. They planned to mount it back on the train for me let rides. A year later I returned and they have thrown it away.
I believe the original video actually ended with a credit thanking the private railway for allowing them to use the train line for the video.
The train line is located near Peterborough UK.