Train spotters Northallerton c1950 probably from Ripon Grammar School

I believe that this is a group of boys and a young man, who may be a student teacher, from Ripon Grammar School. Dad taught there as well as working at the Cathedral. I seem to remember him saying that he had taken some of the boys on the odd train spotting trip. I don't think I have uploaded this one before.
This lot will all be in their 70s by now. Anyone recognise themselves?