I can certainly remember a hot potato vender at the bottom of the New Street Station ramp in the 1960's, I'm sure he also sold roast chestnuts from a little tray. Spent many a Saturday night after a Jazz Club or Dance Hall munching on a hot potato with butter and salt wondering how I was going to get home to Sutton Coldfield. The last vendor I saw was at Christmas time in Lichfield City Centre with my family but that would have been around 2002. Still remember cooking my own in the November Bonfire, happy memories.
Regards,Mike