Name is John - getting near the "three-score years and ten" so I have a few memories! Like crawling over a Metrovick EM1 when I worked briefly at that company. Using lines that are long gone (Bangor-Bethesda, Bangor-Amlwch, Bangor-Caernarfon-Afonwen and Llanberis and Nantlle branches) as well as...