Hi
@Dave29 I would consider just eating real food. Here's some suggestions, very close to what I do except I usually only eat twice a day, sometimes once:
Breakfast
Bacon / Sausages (quality), scrambled egg / omelette, tomatoes, mushrooms, quarter avocado, spinach
Or
Nuts (I have in the same sitting Brazil, Walnuts, Pecan, Macadamia, Cashews (smaller amount), Almonds and Hazelnuts as a base; with on top Strawberries, Raspberries, Blackberries, Blueberries, Red Currents, 2 dollop of Greek full fat yoghurt / double cream, pumpkin and flax seeds.
Lunch (If you have it)
Oily fish, reddish, salad, leeks / Onions, quarter avocado
Dinner
Any fish / meat, mixed vegetables, salad
I Don't eat past 6 or 7pm and do at least a walk after eating.
Don't forget water, tea, coffee (I do fresh brew at home or my favourite is from Sainsbury's 17 cals). And at least 7 hours of sleep, this is when weight loss happens.