seat61 is a good quick reference for train travel and has a site on London to India overland: https://www.seat61.com/europe-to-india-overland.htm https://www.se

seat61 is a good quick reference for train travel and has a site on London to India overland: https://www.seat61.com/europe-to-india-overland.htm https://www.seat61.com/europe-to-india-overland.htm - as you've said Zahedan to Quetta is the hard bit to do by train. It sounds like the problem for many is likely to be getting an Iranian visa: https://www.seat61.com/Iran.htm#Visas https://www.seat61.com/Iran.htm#Visas