Video: David Cameron launches 'Big Society Bank' The fund uses an estimated £400m of unclaimed money from bank accounts which have been dormant for 15 years and £200m from Barclays, Lloyds, HSBC and RBS to fund investment in charities and social enterprises. Speaking at the London Stock Exchange, Mr Cameron said: "Often people look at politicians and manifestos and wonder, will it ever happen? Will something actually change? This Government is actually doing it. Within two years, Big Society Capital has £600 million of funds to invest in our society. I think this is important day. He added: "For years the City has been associated with providing capital to help business expand. Today this is about supplying capital to help society to expand.