Concordia I have not gone to a meeting but I did look on their website.
Why not go along, what have you got to lose! Except weight hopefully, but more to the point finding a new way of eating.
I did a course recently and it was amazing, I heard that it was running and it was free and I was nervous to go but I did and I am so glad I did. It is called a New ID course www.newid.info/ This is a Christian course for people with eating disorders. I am a Christian and I know this course may not be right for everyone and it may not be available in your area but I found it very helpful.
The people on the New ID course might be anorexic, bulimic or compulsive eaters. (I was the latter!).
A bit like you coming to the conclusion you have a problem, I came to the same sort of conclusion about three months ago the penny finally dropped and I realised I was impulsively eating! The course was good in that it has helped me to annalyse some of the issues I was dealing with. So often I was eating out of habit or there would be other issues not really connected to being hungry! I am a bit addicted to food, but I am working on it. I think for some people there is a food addiction.
So for some people diets only work for a while. I really think looking into the reasons why 'we' overeat is helpful. Then combining it with enjoyable exercise (I walk a neighbours dog as I am really not a gym bunny!) and healthy eating rather than 'dieting'.
There is also something in the Berkshire area called OWLS
www.royalberkshire.nhs.uk/wards__departments/d/diabetes_and_endocrinology/owls.aspx?theme=Patient
Again this may not be for you and you may not be in this geographoc area, I don't live in Berkshire either but I have heard about it. It's not a Christian thing, it is run I think by the local PCT (Primary Care Trust). Might be worth seeing if other PCTs offer it? The only suggestion I would make in relation to this particular thing (and I am not recommending it as I have not gone on it) but I would say it might be worth contacting them and asking if they know where else it is offered OR contacting your local PCT and asking or both!
Please do come back and tell us if you go to Overeaters Anonymous. All the very best.