Thanks for the advice guys. My butcher let me down with the short ribs in the end, so they’ll have to wait for another day (soon, I hope!). So plan B - I did a whole shoulder of lamb. I marinated it overnight (olive oil, a couple of cloves of garlic, Harrisa, Ras al Hanout spice & fresh mint), cooked low-&-slow (5hrs + 1hr resting in foil). Served shredded, with pita bread dips & salad - a recipe I’ve cooked before in an oven, but first time on the bbq, with some apple wood chips. Beautiful - sorry, no pics, hungry family devoured it too quickly!