Sounds like you're really doing well! If you're looking to help boost your metabolism, then in lieu of the Hoodia (which I tried and didn't think worked all that well) try green tea. I don't know about the UK, but you can find green tea in pill form or as different kinds of drinks. I've laid off the pills, but I've been drinking Crystal Light Peach Mango Green Tea (it's their metabolism mix) and I also got Dr. Brandt's Pomegranate Water Booster (from Sephora). The Dr. Brandt stuff was a little expensive (USD $35) but I use about 1/2 the amount it says since I like a weaker tea (one dropper in 16 oz. instead of one dropper per 8 oz.). Anyway, I drink the stuff in the morning with my breakfast to give me a bit of a boost. I think it's been helping, as I've lost weight, and I also think it's helped curb my appetite since I'm drinking so many fluids. I just don't notice being so hungry. One other final tip...I also drink a caffeinated drink while working out...which is also supposed to help boost metabolism and maximize your workout. The stuff I drink is another Crystal Light. It's Wild Strawberry (the energy mix) and I use 2 packets in 32 oz. of water. Very tasty and keeps me nice and hydrated.
Well keep up the good work...you'll meet your goal in no time!!