It's definitely enough. Me and my fiance shop at Asda and spend approx £150 a month for two of us on food and toiletries. You just have to buy smart, not things like ready meals.
I recommend:
- 3 for £10 on chicken,
- A couple of packs of mince - irish mince is cheaper than British mince btw and no different in my opinion (you can make a shepherds pie or a lasagne which can last a couple of meals at least),
- Make your own sauces ( you just need things like stock, tins of chopped tomatoes, vinegars, herbs and spices - granted there is the initial expense of buying herbs and spices but you will save yourself LOTS of money in the long-term),
- Buy big bags of value pasta and rice,
- Cheap own-brand cereals rather than branded cereals (and actually often don't taste any different - I buy asda's own version of cheerios and weetabix and they are nice)
- Frozen veg because it's just as good as fresh and you get lots more of it than you would get in a fresh pack
- If you do buy fresh veg, don't buy it ready-chopped (extrmeely poor value, you're better off doing it yourself e.g. carrots, lettuce, potatoes etc).
- If you like sausages, Asda do a pack of 16 richmonds in the frozen section for £2!
Don't be hooked on getting lots of deals because sometimes it seems like a deal but it isn't saving you money, actually it's make you spend more - think to yourself 'Do I need this?' 'Would I have bought this type of item if this item wasn't on offer?' 'Is it likely to go off before I've had a chance to eat it?'
Another tip - freeze leftovers and anything that is likely to go off quickly that you're not likely to finish.
We also get a few freezer type foods for if we're not in the mood to cook (that reduces the risk of wanting to grab a take away just because it's quick and easy), so things like fish cakes, chicken pies etc. Something frozen you can just stick in the oven.