Thanks for the replies.
I don't think the doctor will be much help, when I have raised my weight in the past I was given weight loss/fat blocker pills which gave me diarrhoea, I also don't want to be told to join slimming world/weight watchers which I think is their other go to answer.
I could look into therapy, it just seems so drastic, I don't binge but do have problems with emotional eating and self sabotage but I have no reason to. I had a happy childhood, have never been abused, have good relationships and a loving family. Sometimes I just think it is my inherent lazyness that is holding me back, making changes is hard so I am sabotaging myself to stop myself having to do the hard work.
Ppeat I have tried Paul Mackenna before, I find it very easy to persuade myself that I am hungry, so if I ask myself if I am hungry, the answer is usually yes and I just find myself eating constantly all day 
B1 I think habit changes is going to be the only way I am ever going to make changes but I haven't yet found the right balance of big enough to make a difference but not so hard that I give up straight away. It is snacking on junk at work and unhealthy lunches that is my main problem.
I have thought a lot about what habits I just change but never actually make a decision and make a start, so I will commit now to no snacks (or cans of coke) between breakfast and lunch and lunch has at 12.30 or later (otherwise I will bring it forward to compensate and then snack all afternoon). It is a small change as I don't snack every morning but hopefully if I can do this I can make other changes.
I am trying to think positively but what I expect will happen is that I will have a big breakfast to help me last to lunch time and then will cave in and snack at 11 as I will have convinced myself that I am really hungry or I will know that I am not but will be unable to fight whatever it is inside me that wants me to fail in every small positive change I try to make
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I really hope that you are more successful though, I am just bitter from 17 years of failed attempts.