using Boundary Zone fares for triangular journeys
In an ideal world, if you want to travel by train from A to B to C back to A, you can buy a ticket from A to B, then B to C, then C to A. However, by doing so in Great Britain, more often than not you will pay much more than people doing return journeys, A-B-A-C-A despite that the distance is much shorter. This is because of a historical artifact which effectively penalising off-peak single journeys. In…