This might be controversial but for all its faults as a depot, I'm going to big up Orpington (SE) as one of the best mess rooms... at least in relation to most others around there! Grove Park room is ok too.
Soooo many free doughnuts, cakes and sausage rolls at Orpington.
Charing Cross was recently done a few months back and it’s lovely now, all new everything, big spacious and light, a instant hot tap thing for your coffee, decent Klix machine as well
I'm not convinced on the new Charing Cross. I tend to resign myself to the quiet room. I prefer the old one.