If there is more than one of you a Two Together railcard will pay for itself after one or two trips. There are some pretty good group save deals as well.
Unless it’s an amazing deal, I’ve stopped buying Advance singles for specific trains. Anytime returns aren’t usually much more expensive but...
I’m surprised no one has mentioned Paul Camlin’s reference to “Mr Gem from Chailey” and his ongoing commentary on NSC just before signing off last night.