We have one of these TOFS stores near us, i'm not often in there but every time I go in they appear to have totally different stock. Was in yesterday and they appear to have a lot of branded clothing at very cheap prices, Joules, Tu (sainsburys), George Asda and other brands. Some have been disguised by cutting out labels, others not. Bought this dress for £25, very nice quality, comfortable to wear and has pockets!! I know Joules recently went into liquidation which is why I would imagine some of their stock appears in discounters, doesn't explain the other brands though .
Worth a look if you have one close by?
https://www.joules.com/style/su004909/n01048