Not sure what implications this has.
You've opened a can of worms!
Are you interested in attending one of our fares workshops? I may add this example to those that we cover!
Is a ticket to from Crewe to "Liverpool Stations" valid via Chester whereas one to "Liverpool Lime Street" not? On a "Liverpool Stations" ticket can you still go all the way to Lime Street or would you need to get off at Moorfields?
The tickets are al to Liverpool Stations (there may be some promotional tickets that are an exception to the rule).
ATOC tell
us to use the NRT mileages, but that's
not what they tell the software developers who create tools to calculate the shortest route for booking engines! They are told to use the Network Rail mileage figures (yes in miles & chains) and then decimalise them, and then to allow a bit of extra mileage on top to cover any rounding discrepancies with NRT mileage.
It's certainly valid via Chester if your destination is Moorfields. It becomes a bit of a grey area if you go beyond Moorfields, but let's face it, if anyone presented themselves at the barrier at Liverpool Lime St and asked if they were OK to continue from Moorfields to Liverpool Lime St, I think they would think you are bonkers for even asking and probably wouldn't understand what you were worried about! (Sorry, I know that's not quite answering the question, but when these grey areas occur I am not sure if any of us can provide a 'definitive' answer!)
Why don't they just list map CH in the routing guide so we don't have to do all these sums????
That would be genuinely "simple". ATOC like to do things that are complicated and pretend they are simple. Genuinely making things simple simply isn't on the agenda for the DfT or ATOC or any of the TOCs. The status quo of complicatedness remains!
(Speaking of using the milages in the National Rail timetable to calculate valid routes - why does Table 30 have no mileages for Brigg, Kirton Lindsey and Gainsborough Central???)
There are a lot of errors & omissions like this in the NRT. I suggest you contact the person who is listed as the contact at the start of the NRT, and you could also contact ATOC. Someone who did this said that they welcome such omissions being reported and aim to fix that. So, we'll see...!