I've been marching through National Rail as days in May become available for buying tickets and have saved a lot of GBP by buying in advance. (I admit I was ignorant about how National Rail works, and was surprised when I had to go somewhere else to actually buy the tickets.) I've gotten as far as I can get for now, but I hit a snag early on involving a trip from Moreton-in-Marsh to Bletchley.
I found the exact route I want, but National Rail bumped me to London Midland to buy it. When I tried to do that, I got error messages twice on 2 different days here (nights there). So I tried to get the same ticket through Great Western Railway (GWR), where I'm already registered and from whom I have already bought one ticket. But GWR does not show the option I want which has only 2 train changes. All their listings have 3. Also National Rail shows a price of 30.10 GBP for the journey with a Senior Card and GWR shows a price of 35 GBP.
Next stop, Live Chat with someone at GWR who told me that the National Rail option I want does not meet "guidelines" and recommended that I split up the journey into 2 segments and go to London first, then from London to Bletchley. Being the cantankerous type, I don't want to do that.
The 2 change route I want to take is Moreton-in-Marsh to Oxford on Great Western Railway, Oxford to Coventry on CrossCountry, and Coventry to Bletchley on London Midland. It takes longer than the 3 change option, but I don't mind that.
When I split this journey up, the advance Senior Card price from Moreton-in-Marsh to Coventry is 8.65 GBP for the exact same route. National Rail bumps me to CrossCountry to buy the ticket. The train on to Bletchley is 3.30 GBP. National Rail bumps me to London Midland for it, but in this case, it seems to work. Doing the math, the total price is 11.95 GBP, a little over 1/3 of the National Rail price for the same trip. Both CrossCountry and London Midland quote the same prices as National Rail.
Does anyone (looking at you, Nigel) know why this works this way? Is there any reason why I can't or shouldn't do this? I really would like to get the route and number of changes I want, and now that I know about the prices, also get the tickets at a substantial discount.