HS1▸ has different (higher) fares (essentailly it is just a different route). and it is possible that HS1 doesn't yet have advanced fares.
Yet the other day I bought an advance ticket from
NTA» -
AFK▸ which routed me on HS1. I check now, and there are no avance tickets.
Is this a turn around? Or have
SET▸ suddenly realised that most long distance into and out of Kent will route via St Pancras and so have pulled the cheap tickets? I even bought the advance ticket from SET's website.
I'm aware that tickets into and out of London need to be marked +HS1 or Upgrade+HS1 if you pay a supplement and that those not valid are marked NOT HS1. But that appears to be only in and out of London. 'Any permitted route' does not allow HS1 travel. No mention of
TOC▸ +Connections though. Just been through NTA ticket office and asked there to see if it was a website problem but she too couldn't understand it and declined to comment which I fully understand.
If I hadn't have been able to buy Advance tickets already, I would have assumed that they weren't and never were valid. Have contacted SET customer services to find out more. Will post the reply here.