yep pretty much what has already been said, I looked at this last year as I feel weights have been instrumental in helping me tone with the 5 1/2 stone loss but in the end I got a barbell and dumbells with weights and use my surroundings or do routines that do not require a bench so much.
aside from that sit ups, lunches and a few yoga poses have really helped, 5 1/2 stone in less than 6 months I was really worried about sagging and I still have a bit around my tum to sort but my upper body and bum, thighs, legs are superb, best I have ever been.