M&S Collection Slow Cooked Whole Leg of Lamb Studded with garlic and seasoned with salt, cracked black pepper, rosemary and thyme, our British whole leg of lamb is slow cooked for over 4 hours for succulence. Delicious served with roasted root vegetables and goose fat potatoes. Oven cooks for 105 minutes. Welcome to Collection from M&S, where exceptional quality and intricate attention to detail makes for something truly special. 100% of M&S Select Farms products meet our high quality and environmental protection standards. We know and trust all our Select Farmers, so you can trust M&S for your fresh food.