Hypothetical Railcard Split-Advance Validity Question

[superalbs]

Hi all,

Just been thinking about this in my head, and wondered what the official stance on it was.

If two people wished to use a flexible ticket starting at different locations using an undiscounted ticket to one common destination, and then from that common destination wished to use a two-together discounted advance to another, what would the rights be if ONE of those people's trains were delayed or cancelled enough to make them miss their connection onto the advance ticket train?

Normally, someone who missed an advance due to a connection failure would be allowed on the next train, but if one person makes it in time, and the other doesn't, who is allowed to do what?

Thanks!

Further Information:
Person 1 travels from A to C on a flexible ticket undiscounted.
Person 2 travels from B to C on a flexible ticket undiscounted.
Persons 1 and 2 travel from C to D on advances with two-together railcard.

Diagram is attached to illustrate the above further.

 

[Haywain]

My view is that the on-time person would need to wait for the delayed person - after all they were planning on travelling together. However, discretion can be exercised to each situation.

 

[cactustwirly]

Technically the flexible ticket would not be valid with both people present, as it's a flexible ticket I don't see any reason why it would be allowed.
Surely if you shared a railcard, you would want to wait for the person anyway?

 

[Romilly]

Technically the flexible ticket would not be valid with both people present, as it's a flexible ticket I don't see any reason why it would be allowed.
Surely if you shared a railcard, you would want to wait for the person anyway?

But the OP's question was to do with the railcard-discounted ticket being an Advance.