Machine to change Coins into Paper money notes

I need to change a lot of coins I have into banknotes. I have heard of machine, that is changing coins for paper money notes in UK. Does it exist ? Where can I find it in London ?

There are a couple of machines in London, that allow you to change coins into cash banknotes. These machines are known as the Coinstar kiosks. They are usually situated in bigger stores like Asda, Sainsbury's, Tesco or Morrisons. You can find many of the Coinstar kiosks in central London. Please note, that changing coins into paper money is probably not free of charge.