First Class Off Peak singles are still available, but at £149.50 each way are eye-wateringly expensive, even with the railcard discount applied. First Class Anytime singles are even pricier than that!
I'm pretty sure they do, as it is the same buy new and refund process that other retailers use.
They do.
If it was bought through the forum site, we would do our best to help, but as it was from LNER it's entirely at their discretion.
For now, yes, but if LNER/DfT get their way, then Leeds to London will go the way of Newcastle/Edinburgh to London, and only wealthy people or those on expenses will be able to afford that.
Trainsplit/the forum site let you choose paper tickets (you get a code to type into a ticket machine-or give to ticket office staff if no machine available).
It doesn't usually make a difference; the exception is where your entire journey is exclusively with that TOC (and, potentially also there are no connections), then sometimes there may be an auto delay repay option.
The forum's site does allow that option.
I don't see why that's surprising; this is what I would expect.
It's slightly surprising to me given that if you purchase a cheaper Advance you're not supposed to get the difference back in the event of a refund. Surely a discounted Advance will almost always be cheaper than the undiscounted one purchased, unless it's left right till the last minute to book.