Aldi beauty products (from shower gel, shampoos to the cleaners and face scrubs - all of it is amazing and such good quality I will never ever buy elemis again!!)
Superdrug are brill for beauty stuff too - cotton pads/face oils/wipes basically all the basic skincare stuff dead cheap but as good quality as the dear stuff. And all cruelty free
Aldi nappies and wipes - hands down the best by miles and miles.
Aldi baby food (and snacks and juice) - basically just Ella's kitchen but at 1/3 of the price
ELF make up - all cruelty free and non comedogenic and the liquid concealer is the best I have ever tried by far - no creasing and fucking brilliant coverage. I have bags darker than the devils soul and that concealer makes me look like I have a newborns skin. I think it's around £4.50 might be £6
Primark make up - it's SO good. It's hard to believe I know but just have a look at some tutorials. They have duped basically all of the leading brands and they have come out so well!!
Everything 5 pounds .com - it's just the stock that high street shops didn't sell in time, so you could be getting topshop jeans retailing at £30 for a fiver. Or a pretty little thing dress for £5 that was meant to be £50+.
Wilkinson's cleaning/laundry products. They are just dupes of big brands but at a much lower price.
Sainsbury's/Asda/primark baby clothes. I will never go into mothercare for a £40 outfit again when I can get 739178 jeans and shirts for that price in those shops. Brilliant quality too and wash amazingly well.
Primark false lashes. Pro tip - if you get lashes that look too 'perfect' and you want that natural look, just scuzz them side to side with a spoolie to rough them up abit and they will go all wispy and feathery instead of cheap and plasticy looking.
Primark home stuff, perfumes and basic clothing (like the vest tops/cami tops/long sleeve and leggings/shorts used to clean the house in - not even £4 for top and bottoms)
You can get good brand hair dye and fake tan in home bargains/b&m/savers etc for half the price. Anything that you want 'big branded' you should get it from a shop like that instead of main supermarkets.