Inchindown, on this thread -
https://www.diabetes.co.uk/forum/threads/sandwiches.158943/page-2#post-1931557 - you received a number of excellent suggestions on how to begin finding help for your eating disorder. I encourage you to go back and follow through with all of those suggestions.
By participating locally in a group or online on a forum, for those with eating disorders, not only will you get help for yourself, you'll be in a position to help others too.
Surveying your recent posts, it looks like you had 4 stents put in back in October. That will likely buy you the time you need to begin understanding how to begin the long process of turning your life around.
Sugars and starches are incredibly addicting. One of my favorite presenters on this topic is Susan Peirce Thompson of Bright Line Eating - (interview begins at 2:29 minutes)...
By listening to this interview, you'll learn...
- about structured eating. "part of the foundation of living happy, thin and free...is planning your food in advance"; having "the structures in place to make the food choices you want to make in the moment"; "the key is making it so that the healthy choice is the easiest and most readily available choice for those moments when your will power is not going to be there for you"; "write your food down the night before, have a little food journal by the fridge, you know, just plan it out the night before, have a really clear food plan with categories and quantities of foods that you eat at each time you want to be eating, so you're not having to think what am I going to eat from the whole range of options in the universe, but rather where's my protein, where's my vegetables, you know those kinds of things."
- about the importance the hormone leptin. It's "the hormonal signal that tells our body that we're not hungry anymore and we really want to be active." "This is the eureka hormone for anyone who wants to lose weight. You've got to have leptin on board. If you don't have leptin on board, you're literally starving, your brain thinks you're starving. That's going to manifest by not being able to move and in shoveling food into your face."
"Leptin is produced by the fat cells actually produced by the fat cells, the fatter you are the more leptin you have." "It's not that you don't have enough leptin. It's that you're brain can't see it."
What's causing the problem? "[High baseline levels of] insulin blocking leptin at the brain". What has caused increasing levels of baseline levels of insulin over the last three or so decades? Eating more and more sugar and flour and the sedentary lifestyle.
I've got to go, but hopefully this is enough information to interest you in listening to the entire interview.
Robert Lustig, M.D., one of the researchers at Univeristy of California, San Francisco, is one of the researchers she refers to on how insulin blocks the brain's ability to get the leptin signal. In this video, Dr. Lustig spends 2 minutes showing how an increase in processed foods over a 44 year period - (1970 - 2014) - correlate with a 4 fold increase in the amount of insulin it takes to bring glucose levels down. This lecture was intended for Dr. Lustig's peers. It's fast paced and difficult to follow, BUT I encourage you to watch just these two minutes 13:57 - 15:45...
If you'd like to learn more from Dr. Lustig, this lecture is easier to follow and understand...
I would find another DR and I know help for mental health has a very long waiting list. but if your DR/GP is a good and understanding one, he or she might push you as priority so you could be seen asap. Again with some supportive people here, maybe you could find the time with the imformation provided to repair your relationship with food. like swap out those cookies, crisps and biscuits for some different food items of protein, I too, tend to find protein quite filling. 
