This is kind of inspired by the "quickest route not permitted" thread that is ongoing at the moment.
A journey I make semi-regularly is Sheffield to Ely. The valid routes for this journey involve getting from Sheffield to Peterborough (via one of many different allowed routes) and then direct from Peterborough to Ely. The last train from Peterborough to Ely arrives in Ely sometime around 22:45. However, if from Peterborough, you were allowed to travel to Stevenage, then Cambridge, then Ely, you could travel later. The last train via this route arrives in Ely at approximately 00:30, almost two hours later. Being a longer route, this only equates to leaving Sheffield around an hour later, not two hours later, but there are many times when I've found it useful to do this.
Tickets to Cambridge are available for both routes, either "via Ely" or "not via London" (which effectively means via Stevenage), so I've always found it odd that there is no ticket to Ely via Stevenage. It's made even more confusing because the (only available) ticket to Ely is also routed "not via London", suggesting that via Stevenage is allowed like it is on the equivalent Cambridge "not via London" ticket. But it isn't allowed, because "not via London" doesn't actually mean "via Stevenage", the routeing guide doesn't allow travel via Stevenage, and journey planners show the route as needing two tickets. Personally I can work around this by buying a ticket to Cambridge, and using my season ticket between Cambridge and Ely, but without the season ticket it would be much more of a faff to deal with.
Are there any other journeys like this, where the valid route is more limited than an invalid route in terms of the times of day you can make the journey?
A journey I make semi-regularly is Sheffield to Ely. The valid routes for this journey involve getting from Sheffield to Peterborough (via one of many different allowed routes) and then direct from Peterborough to Ely. The last train from Peterborough to Ely arrives in Ely sometime around 22:45. However, if from Peterborough, you were allowed to travel to Stevenage, then Cambridge, then Ely, you could travel later. The last train via this route arrives in Ely at approximately 00:30, almost two hours later. Being a longer route, this only equates to leaving Sheffield around an hour later, not two hours later, but there are many times when I've found it useful to do this.
Tickets to Cambridge are available for both routes, either "via Ely" or "not via London" (which effectively means via Stevenage), so I've always found it odd that there is no ticket to Ely via Stevenage. It's made even more confusing because the (only available) ticket to Ely is also routed "not via London", suggesting that via Stevenage is allowed like it is on the equivalent Cambridge "not via London" ticket. But it isn't allowed, because "not via London" doesn't actually mean "via Stevenage", the routeing guide doesn't allow travel via Stevenage, and journey planners show the route as needing two tickets. Personally I can work around this by buying a ticket to Cambridge, and using my season ticket between Cambridge and Ely, but without the season ticket it would be much more of a faff to deal with.
Are there any other journeys like this, where the valid route is more limited than an invalid route in terms of the times of day you can make the journey?