As a proud Welshman, there's only one option for me: Castle Dairies. They do spreadable and normal (unspreadable?) butter - it has more salt than most salted butters (with the possible exception of President) and, most importantly, it actually tastes of butter
Lurpak for toast, nothing else needed. Slap something wet on ya bread. Job done, slice of tomato, cucumber, onion, lettuce.. no need for lard on ya bread.