OP Mumsnet is overall a bad place for diet advice. Already seeing some poor advice.
You don't need to count calories, cut out any foods, etc.
You need to think about why - why do you overeat? Is it bingeing? Is it because it's there? Is it because you eat when you're not hungry?
I lost 55lbs this year and didn't count, track or remove anything.
I:
- walked (only exercise I did) - aimed for 10k steps a day. Any movement is good though, you'll stick to something much better if you actually enjoy it
- changed my habits and perception around food
I started with 3 meals a day, to reconnect with my hunger/fullness cues and understand when I'm actually hungry.
Balanced meals - nothing is off limits. But if I wanted a twix, I'd have it but add some fruit and maybe cheese or nuts for protein. Only eating it if I'm actually hungry.
Stop eating when you're full. This becomes easy as long as you eat slowly, mindfully, without distractions - proper mealtime habits, sit down at the table, chew slowly and really think about how nice the food is.
Now I don't stick to 3 meals a day, I can now understand when I'm hungry so eat whenever I am. Allowing myself to eat all foods instead of dieting meant that suddenly I didn't even want them, because they would always be there when I was hungry.
Your body doesn't want to be overweight. If you listen to your body and eat when you're hungry (and aim for balanced meals) you will lose weight.
This method isn't as fast as a diet, but it's sustainable and easy. I go out to eat all the time, never feel like I'm on a diet, finally feel like food has no control over me. It's life changing!