Have a neighbouring farmer who runs a suckler herd of North Devons and sells all the meat privatley in boxes and pubs etc. All there grass is permanent pasture and river meadows and they seam to do well on it and the cattle seam very quiet. I've eaten some steaks and sausages from them and they were very nice. Like your lamb the key is a local and professional slaughter house or u'll ruin all your hard work and have a lot of tough meat to get rid of! As they're a local breed to your area it would be silly not to go down that route.