I have used Tesco's ribs and wasn't impressed tbh, too large and fatty. The best Supermarket ones I have bought and use regularly are Morrisons. They trim them really well but leave plenty of meat on them. Worth getting to know the lads behind the counter, and get the meat from out the back as they can show you the cut/rack before cutting, trimming and wrapping for you as they usually see you right, with the cuts of meat in general also. (nice Pork Shoulder, brisket as well)
The ribs are generally from the belly but occasionally you can get the babyback loin ribs at the same price, if they have them in. At the moment they are £5.99 a kg and a rack works out £3-£3.50 each but they sometimes have them on offer @ £3.99 a kg. If cooking them for just me and the wife 2 racks between us is plenty. If cooking for more I tend to add an extra rack per 4 people and that is more than enough meat for everyone.
The only things I have to do to them when I get them back is tear the membrane off the back of the rib rack and then just add the mustard and rub and leave it overnight, add smoke for approx 2-3 hours and cook them off spraying a mop on them every 60-90 minutes after the smoke part is finished until they reach 195F and then to finish them off I usually coat them with my homemade sweet and sticky sauce and put them on a grate over the dying coals to slightly caramalise the sauce and to get them finger hot before serving
The only way I can guarantee to get babyback ribs is from my local butchers and they are really nice but as it Packington Free Range pork it costs a premium, so only do this occasionally.
