Band together to bring down your bills!

Serena Cowdy

In recent months, group buying sites like Groupon have soared in popularity. In a nutshell, if enough group members sign up for a particular deal (like a spa day or restaurant meal) the price of that deal comes down for all of them.

The concept is expanding - and there's now a 'crowdsourcing' website that allows members to get better deals on utilities, phone and broadband packages...