I might have mustard (though rarely) on a ham sandwich, or to spice up a mackerel pâté or something, and it's great in piccalilli, but I never want it unadorned on my plate. I regard mustard with seeds in to be greatly overrated... Horseradish sauce is a sine qua non on a roast beef butty.

Which Stratford are we talking about here? I taught in Walthamstow from 1980 to 1986 in a terrible school...