The question: see below!

Just a thought, as a youngster, we had shin or sometimes skirt. When married, that changed to sirloin or topside. That went for pasties too.

It looks like we've been on the scent over this Box Heater name. I met my son-in-law's elder brother in the street this morning. He works with meat and has done for a long time. He agreed that 'Box 'eater' refers to a V-shaped cut near the collar of Beef, Pork or Mutton and is so-named on account of the shape which resembles the old irons which were filled with hot coal to help them smooth cloth. Looking at the map, I think you could say the Box Heater Junction is where two roads converge to make a shape like the leading part of an iron! There we have it sussed, I reckon!

Stone me, me sparrer! You done that on yer jack (own). Box 'eata, nice cut and easy on the sausage (cash). Would you adam and eve (believe)it?