thanks for the updates. I googled Minworth Metals and found a post on another forum (PPRuNe) from 2 years ago asking for info/photos on the yard but there haven’t been any replies!
All the planes had disappeared by the end of the 50s – when I had my first bike in the 60s and started riding round the area, there was no sign of anything left. The area is now the Maybrook Trading Estate.