Buy/Sell BTC with cash in London. Accepts cash, Liberty Reserve, Moneybookers, Pokerstars USD, Liqpay, Alertpay, Perfect Money and more.
site link: http://londonbitcoinexchange.wordpress.com/
Choose carefully any service that store and manage funds for you. Very few Bitcoin businesses offer enough insurances to be used to store money securely like a bank at this point.