after losing 5 stone myself i was left with a fair bit of lose skin, tried everything to get in tighter etc. In the end i thought long and hard and though why not fill the space back up - but with muscle. i then put on a stone of muscle and the skin is alot tighter everywhere. to also keep anything from slipping im am very strict with my diet etc, dont eat and polyunsaturated fats as this makes me feel ikky and my fat looser, and dont eat gluten or cows dairy.
it will obviously be different for you, but putting on the muscle was the best think i did, plus you look great!