Slightly off topic, I was with my Granny at Padd last year, we got off the Met at Paddington Suburban, and was heading for the Connect. As the ticket office is closed at that end, and she is not that good on her feet... I parked her on a bench and walked to the ticket office at the far Southern end of the station. I queued, and asked for two tickets one with YP railcard and one with SNR...
Anyway the guy in the office stated that he needs to see my Gran, complete with her railcard in order to sell a ticket. I explained we got off the H&C and she is sat because she can't walk very far quickly especially as the station was quite crowded... he insisted this was the rule and wouldn't serve me... I said anyone can walk up to the machine and buy a child or RC discounted ticket, I had already shown him my YP railcard...
I personally think he was downright exceptionally disgraceful expecting me to go and drag my 80 year old gran with a stick from the other side of the station, to go and stand in a queue, just to show him her railcard !