When buying a ticket from London to Bedford, a ticket from Euston (London Terminals) to Bedford (purchased from London Northwestern) is more expensive than a ticket from St Pancras to Bedford (purchased from Thameslink or East Midlands trains). Both are marked as any permitted and so should be valid via Bletchley also. My question is, would the ticket from St Pancras to Bedford also be marked as London Terminals to Bedford? Because if so that would mean the same ticket is costing a different amount when purchased from different train companies.