"CurrencyFair matches people who want to sell Pounds, Euros, Dollars or whatever with people who want to buy them.
Note that word 'people'.
It's a unique marketplace where people can exchange currencies with other people, anonymously, at rates only otherwise available to multinationals and market professionals dealing in millions. No banks involved. No middlemen in pinstripes. Just CurrencyFair, smoothing the process along, making it safe and secure." (http://www.currencyfair.com/)