Just a quick remincense, late 1950's,my brother, 2 mates and I would buy a 2d platform ticket at Grantham and board the Nottingham train which was made up of non-corridor stock and ride to Nottingham Victoria for a day's trainspotting. Lot's of Midland loco's, Brits and diesels not seen in Grantham were watched while eating our 'sambo's' and 'pop' then 5pm back on the Grantham train and spend half an hour on the platform before giving up our 2d platform tickets and going home. Happy days, we did this for a couple of years and then DMU's replaced the old loco and carriage stock, so that was the end of that!
Cheers
Ron