A while ago i used to weigh 12st 9lb and i went to weight watchers and lost nearly four stone in 6 months, and i have maintained it for 4/5 years now, i went from size 18 to 8. I know diet clubs dont always work for some people but i found it really useful, you can still eat what you like but in moderation that was the main thing (i am a sucker for takeaways). I also walked every day (fast) for 30 minutes, ate plenty of fresh veg and grilled meat and drank lots of water. And the weight dropped off.
I will be back to doing all this again in July after babies born! eating what the hell i like for the time being!
Good luck to you all you all seem to be doing really well!!