It’s the number of passengers that traveled from a specific station to any other station in UK.
Passengers are assumed to have taken the shortest rail route from station A to B. Which is interesting, because it might not have been the fastest route. For example there are a few different routes between Euston and Crewe, and I don’t think the fastest non-stopping trains take the shortest route.
Yeah, I noticed that there was no link from Edinburgh to Glasgow on the East Coast mainline from my local station. Presumably the passengers that took this route were assumed to have taken the West Coast Mainline.
Crewe does take the shorted route - Stafford, Trent valley, then bypassing rugby.
The cheap trains do the same route and just stop along the way. The ticket itself is valid for say journey into Birmingham, soend the day, then continue via Banbury to Marylebone. I’ve done that myself several times, but it’s a minor flow compared to the direct train.
Manchester to London - at least pre covid, had 3 trains per hour, one via Crewe which was slightly longer, the others via Stoke.
Passengers are assumed to have taken the shortest rail route from station A to B. Which is interesting, because it might not have been the fastest route. For example there are a few different routes between Euston and Crewe, and I don’t think the fastest non-stopping trains take the shortest route.