I thought it was a standard email sent every game. I'm pretty sure I've had it for every away since the new policy. Some people will be checked. That's the same always unless it's Palace where everyone's checked, or abroad where you need to give ID to get your ticket.
Given up on this one. Full refund with no admin fee from Trainline, thankfully, but as a non-driver with a 16 year old in tow we'll be watching this at home now. Thanks ASLEF.