There is a menu on the website
Tripadvisor won't let me attach the link, but click on 'Station Buffet' and then 'Breakfast Menu'
i've just been to Barter Books and we had to ask that butter was "NOT" put on the buns. they were very careful in making sure we got exactly what we wanted, perhaps your review gave them a kick up the "Proverbial"
Ps as for sauces, tomato or whatever, they are available around the place and always have been.