Or for Middlesbrough? Thornaby is a much more likely interchange point for many journeys.
Darlington to Stockton passes the fare-check at Thornaby, but fails at Middlesbrough, so what then?
I agree. Darlington to Stockton is valid via Thornaby, there is no question about that, therefore it is automatically valid via Middlesbrough. There is no need to check the fare to Middlesbrough!
If Stockton was a member of Middlesbrough Group (which it
isn't)
then it would not be valid to double back between Thornaby and Middlesbrough, except on a direct Darlington to Stockton train (if any do that).
However as Stockton is not a member of Middlesbrough Group, there is no issue.
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This has to be the logical interpretation.
There are some routeing points such as the Bristol Group which has five members to the group, two of which contain the word Bristol (Temple Meads to the south and Parkway to the north). Fares to these two stations are obviously going to differ and the Routeing Guide does not specify which of these is to be used when carrying out the fares check process. The only understanding thus is that any member of the group can be utilised and no one member of any group is more important than another in fares checking.
I agree. It would have to say something like "the most expensive station in the group" or alternatively it could say "the primary station in the group" (they could then nominate one particular station to be the primary station). There may be another altnernative method to determine a specific station, but none that springs to mind.
In the absence of any defining statement that limits you to a particular choice of station, I cannot see how anyone can impose that choice, therefore Deighton is a valid choice. The fact that booking engines allow travel via Deighton/Huddersfield suggests that the booking engines agree. That doesn't mean the booking engines are always right - we know they are not always right. But they are certainly more often right than they are wrong.
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It doesn't specify in the routeing guide what happens when the routeing point is a group, rather than a station.
In this case, Deighton to Leeds passes the fares check rule, so you can say that Huddersfield Group to Leeds is valid for this journey.
The fares check rule doesn't come into it. Deighton is a member of Huddersfield Group. Therefore no fares check to determine appropriate Routeing Points (RPs). It is an RP. I agree it's not clear but the implication is that doubling back within the group is not valid, but in some cases that is rather unfair and probably would not be enforced as it defies common sense.
I thought you were asking about whether a journey from Deighton to Leeds passes the fares check from Huddersfield, which is why I said the fares check rule doesn't come into it.
I now realise you were asking about Brighouse to Leeds, using Deighton (as a member of Huddersfield Group) to Leeds to determine if Huddersfield Group is a valid RP for that journey. I agree that it is.
The implication is that Deighton to Leeds is not valid via Huddersfield (no fares check rule applies and no easement permits doubling back) but Brighouse to Leeds is valid via Huddersfield. This is almost identical to the situation of Cross Gates/Garforth/East Garforth/Micklefield to York
not being valid via Leeds, but South Milford to York
is valid via Leeds.
