I grew up somewhere where offal was always on the menu, so I remember seeing a pile of sheeps' heads in the back of the butcher's station wagon on numerous occasions. I've always loved liver, and kidneys (preferably lambs') and my mother was big on tripe and elder (I believe elder is cows' udder, but I've never met anyone who could corroborate that). However, the brain was always right out. Ditto heart and tongue.
Lancashire man, walking in to a Yorkshire butcher's: "I'd like a sheap's 'ead."
Butcher (to boy in back): "Ian! Ian! Bring us a sheap's 'ead."
Lancashire man: "Mek shooer it's a Lancashire sheap!"
Butcher (to boy in back): "Ian! Ian! Tek t'brains owt!"
To be fair, that was first told to me by a Lancashire man, with the counties reversed.