I'll see if I can avoid posting the exact journey without it being too confusing...
I'm trying to do a journey from A to B via X. Going via X is only valid on a mapped route when I use a particular associated routing point for B. I'll call my chosen associated routing point C. So, to see if I can actually use C as the routing point I'll need to do the fare check rule. A is a routing point in itself.
To do the fare check rule I check the whether single tickets from A to B cost the same or more than tickets from A to C. If they do, then the route is valid. Now, my route passes the check when comparing Any Permitted tickets, but I actually want to use a cheaper Via Y ticket. Y is on the route I want to use anyway, however when I compare the Via Y tickets between A and B/C the fare check rule fails.
So, as I understand it, the route via X is valid only if you use a Any Permitted ticket, even though you do end up travelling through Y anyway.
However, NRE shows that I can use the Via Y ticket specifically via X just fine. I can also make thetrainline powered websites book the journey (not on WebTis though). Additionally TCBC's Permitted Route Search thinks it is fine as well.
So I am wondering whether the fact a route via X is valid on a Any Permitted ticket means that I can go via X even if my (otherwise valid) ticket fails the fare check rule, or whether this is just a bug with routing engines that I can exploit (since NRE is definitive).
Thanks!
I'm trying to do a journey from A to B via X. Going via X is only valid on a mapped route when I use a particular associated routing point for B. I'll call my chosen associated routing point C. So, to see if I can actually use C as the routing point I'll need to do the fare check rule. A is a routing point in itself.
To do the fare check rule I check the whether single tickets from A to B cost the same or more than tickets from A to C. If they do, then the route is valid. Now, my route passes the check when comparing Any Permitted tickets, but I actually want to use a cheaper Via Y ticket. Y is on the route I want to use anyway, however when I compare the Via Y tickets between A and B/C the fare check rule fails.
So, as I understand it, the route via X is valid only if you use a Any Permitted ticket, even though you do end up travelling through Y anyway.
However, NRE shows that I can use the Via Y ticket specifically via X just fine. I can also make thetrainline powered websites book the journey (not on WebTis though). Additionally TCBC's Permitted Route Search thinks it is fine as well.
So I am wondering whether the fact a route via X is valid on a Any Permitted ticket means that I can go via X even if my (otherwise valid) ticket fails the fare check rule, or whether this is just a bug with routing engines that I can exploit (since NRE is definitive).
Thanks!