Preheat the oven to 210C/190C Fan/Gas 6. Make small incisions all over the lamb and stud each with a piece of garlic or anchovy. Season the leg well with salt and freshly ground black pepper.

Preheat the oven to 220C/200C Fan/Gas 7. Using a small sharp knife, make a series of small slits over the leg of lamb. Put 2 tablespoons of the thyme in a bowl with the paprika and oil ...