Agreed. I remember foolishly getting a couple of pints in before my first journey on a 455. Until then I didn't realise that there were mainline trains without toilets (except for West Midlands Railway's special weekend 172's to Stratford-upon-Avon, with every toilet invariably locked out, seemingly just for giggles).455. No loos on board. Maybe others with no loos but I don't use the other classes without loos.