Why would a train journey only show as unavailable on some sites?

[MinnieMountain]

We’re travelling from Worcester to Peterborough via London tomorrow.

On checking the timings I’ve found that LNER and National Rail say the tickets are unavailable. Yet GWR and LNER will sell tickets for the 2 separate legs.

Does anyone have any ideas why? Could it be a case of all the reservations being sold? The route is not affected by engineering works.

@MinnieMountain

Have you looked at the journey on the Trainline?

I've just tried out Worcester - Peterborough, which seems to be going via Birmingham, as you would expect, but there seems to be a bus in the middle of it.

https://www.thetrainline.com/

I have now @TheSquareMile . Same result- can’t book the whole journey but the individual legs are available. Most odd.

Is it because it's two different train companies and would have to include a Tube journey if trying to do it as all one ticket?

It does involve the tube @Needmorelego but the TFL journey planner says it’s running tomorrow.

@MinnieMountain

Is this what is disrupting the service, OP?

https://www.nationalrail.co.uk/service-disruptions/reduced-wm-rservice-20240824/

It's perfectly possible for a journey involving 2 train companies and a tube trip between them to be done on one ticket, I've done that loads of times. The ticket allows for tube travel - paper ones have a symbol on which indicates it includes the tube, e tickets or mobile tickets open the tube entry / exit gates when scanned.

It may be the seating. LNER will only sell the ticket if there is once seat available for the whole journey. But things like Split Tickets will find you a ticket when you have one seat from, say, London to Peterborough, another seat in a different carriage from Peterborough to Doncaster m, and a third seat from Doncaster to your destination.

I'm seeing the whole journey available on trainline. The cheaper ticket option offered is a split ticket with separate tickets for various bits of the journey (which makes the total cheaper), but there is one ticket covering the whole journey available

Though actually am not sure that's via London.

No it's not so please ignore me!

@RichardMarxisinnocent yes I've always thought you can have an "all the way" ticket that covers a Tube connection.
I just thought maybe it was confusing the computer 😂