Our butcher used to make us up a 'Leg of mutton' joint, which I think is further up the shoulder than a 'Salmon Cut', and needed a longish time in the oven.
It was always a bit cheaper than better cuts, and anyway, as we were immediate neighbours, he always took a few pence off our order, and was a delightful gentleman in his own business! Luckily, his wife is still around for a great hug and a chat whenever we meet, but the shop has long gone, sadly!