I don't think there's any risk of pricing managers latching onto this as these routed tickets are well known as good value and have been around for many years.
I am looking at the £34.90 off peak return. These have a 4B restriction, which has nothing of note and a route restriction of "Via Barnham"
Journey planners route these via the South Coast and Ashford, resulting in a long journey with lots of changes. Can they be used Fratton -> Brighton -> St Pancras -> Canterbury? I presume there is some electronic data in the background preventing them from being offered (as it significantly undercuts the usual fare you'd pay on that route) but as far as I can see, the journey would be on a permitted route.
I am looking at the £34.90 off peak return. These have a 4B restriction, which has nothing of note and a route restriction of "Via Barnham"
Journey planners route these via the South Coast and Ashford, resulting in a long journey with lots of changes. Can they be used Fratton -> Brighton -> St Pancras -> Canterbury? I presume there is some electronic data in the background preventing them from being offered (as it significantly undercuts the usual fare you'd pay on that route) but as far as I can see, the journey would be on a permitted route.