For information LNER are withdrawing all walk up (buy on the day) off peak tickets from 5 February, on certain of their routes.
This will mean that if you don't have an advance ticket (which are still available on many journeys until a few minutes before departure) you will have to buy a new 'Flex 70' ticket.
However they will be quota controlled and will not allow for a break of journey as current walk up off peak tickets do.
If the Advance ticket quota and the Flex 70 quota are both sold out you will have to buy an anytime ticket- typically twice the cost of a former off peak ticket.
See this news release- https://www.lner.co.uk/news/lner-launches-pioneering-pilot-to-further-simplify-fares/
Note the news release does not mention the quota on the Flex 70 tickets- that is from other sources.
This will affect people who fly into a London airport and wish to move on direct the same day to somewhere like York- circumstances where you can't buy an Advance Ticket due to potential flight delays.
This may promote to forum users either the idea of a buffer night in London, or greater use of Northern England airports like Manchester, Leeds/Bradford and Newcastle.
Flex70 tickets went on sale today.