Firstly, well done for losing what you have so far, and keeping so much weight off between memberships
And also for getting back into a group. There are so many people who have the same thoughts you've just mentioned, but then don't actually go back to a group, so well done for having the courage to walk back into a group
(I hope I don't sound patronising with those comments, I don't mean them to be if they sound that way
)
It could be your body getting used to the change in diet, but from what I can see, you don't seem to have much protein in your meals?
Adding protein will help keep you filled for longer - so maybe add some eggs to your toast in a morning, or pick up some Arla Protein yogurts (or the much cheaper Lidl version for about 39p from what I saw the other day!) and have that with some fruit?
Or for your lunches, add something with a P next to it from your book.
If you can add some P foods to each meal, or as many meals as possible, you're less likely to feel hungry between them