Thank you for your replies everyone- really grateful for your ideas and experiences. @EmmetEmma , thanks for the book suggestion. I'll see if it's on Audible to listen while I'm walking.
@BadGranny that's a good idea. If I'm brave enough, I could look back over July's bank statement at the top up shops and takeaways to see how much I've been spending. I think it's going to be a shocking amount, to be honest. But could add more to my savings and a regular treat. I saw a tiktok about ideas for treats, like having an unlimited cinema membership and just going every week to see something.
@millsiem and @Peony654 when I'm keeping track of my food, I tend to stick with similar breakfasts and lunches, just for ease. Breakfast is usually 2 eggs, mostly scrambled with a bit of marmite and a laughing cow triangle. It's quick, hot, filling and savoury. Cheese and savoury snacks are my main binges so I think that helps. I also genuinely like salad, so that is my lunch, either with chicken or cheddar cheese for protein.
Then dinners are a bit less diet-y, to accommodate my whippet-like husband. We have things like spaghetti bolognese, homemade burgers, salmon stir fry, chicken and chorizo paella, gammon or beef steak and salad, roast chicken, beef stew. When I'm not on track, I will often add cheese to my eggs in the morning, and skip lunch, then buy snacks on my way home from work- crisps in particular.
There is one habit that has stuck since first losing weight. I am quite low-carb when it comes to meals. I don't have bread very often, and will happily have salad instead of chips with the gammon, steak or burgers.
Yes, I think I need to get my husband on board. I don't tend to tell him when I'm 'back on my diet' because it feels like so much pressure. But he can eat anything he likes without putting on weight, so I guess I need his support with the takeaways.