Put the lamb in a big bowl. Mix together the garlic, paprika, vinegar and thyme and rub into the lamb. Drizzle over the olive oil, cover and leave to marinate in the fridge overnight (or for a minimum of 2 hours), turning occasionally.
Take the lamb out of the fridge and allow to come up to room temperature and spark up the barbie. Wait until the flames have died down and the coals are