If you are on Mat leave surely you can do a load of cooking? So cheap nutritious meals with little to no processed food should be achievable well within this budget. E.g. roasted veg (a combination of courgette, pepper, onion, tomato or mushroom) with a protein (chicken thighs or wings, tofu, salmon, cod etc...), omelette with fridge leftover fillings, tofu stirfry, cauli cheese, curry with any combination of veg, egg fried rice, any mince dish padded out to double the size with lentils and or veg, pasta and pesto, jacket spud, sausage / liver and mash, stir fry, meat or fish and basic veg, fajitas, stroganoff, bean chilli etc... T
ry and plan to use all of a bulk ingredient eg if we have spinach for curry we'll then use it in a pasta and salads to make sure it doesn't go to waste. I'm a complete technology numpty and do this manually but AI can help I'm sure.
I use mainly eco toiletries and cleaning products so those don't end up on the weekly shop but spend less than £70 per week for two of us including meat from the butcher and veg from the local market. The cooking is hard work but very doable. We have no snacks other than fruit and no drinks other than filtered water or soda stream fizzy water with lime (replace the gas for this for £12 every 2 months or so) and buy water filters every 6 months ish.
You could ask for nice oil or spices for birthday gifts to minimise spend on those type of items.
Lots of people suggesting Aldi. Unless our local retail park Aldi has inflated prices Lidl is significantly cheaper. Even spendy Sainsbos looks better value than Aldi tbh!
Though ultimately if you're that skint you'll need to go back to work 🤷🏻♀️