Things like butter can be added by the diner at the table to the quantity they choose - there is no reason for the "chef" (aka microwave operator - I might be being a little disingenuous) should add this product. One reason I like Samuel Smith's Brewery is their very explicit labelling of products. They are the only Brewery of any scale that I know that labels their draught beers as being vegan. Two small Breweries also do, these being Marble (from Manchester) and Springhead, from Nottinghamshire.
Three cheers to Samuel Smith's Brewery for clear labelling!
DB.
PS Webmaster, can we have an icon of a beer glass/tankard as well as just smiley faces? In fact, anything else beer and brewery related would be good too.