Yeah, Jon uses roads.org.uk for research, plus (I believe) https://www.sabre-roads.org.uk/maps/ https://www.sabre-roads.org.uk/maps/ and https://pathetic.org.

Yeah, Jon uses roads.org.uk for research, plus (I believe) https://www.sabre-roads.org.uk/maps/ https://www.sabre-roads.org.uk/maps/ and https://pathetic.org.uk/unbuilt/ https://pathetic.org.uk/unbuilt/ - he’s great, new videos most Sundays, I think.