What the hell is a charity shop? Like a storefront for a non profit that you can donate money to or a shop with cheap subsidized groceries for poor people?
Essentially just a thrift shop run by a charity, with proceeds going to their stated goal. In the UK it's generally Oxfam, Cancer Research UK or the BHF (British Heart Foundation)
Others have mentioned in a separate thread, but it is a thrift shop operated by a charity.
Thrift store. Like Goodwill.
UK Charities collect unwanted used/unused products from people and sell to fund their operations. Product ranges from small toys, books, tableware, clothing, used electronics to furnitures. Sometimes you found good new stuff too.