https://www.railmaponline.com/UKIEMap.php https://www.railmaponline.com/UKIEMap.php is also an invaluable resource. Also, The National Library of Scotland has

https://www.railmaponline.com/UKIEMap.php https://www.railmaponline.com/UKIEMap.php is also an invaluable resource. Also, The National Library of Scotland has old OS maps in a pretty nice interface, in case useful: https://maps.nls.uk/os/ https://maps.nls.uk/os/