Retail: The rise of the 99p and pound store

This week, BBC Breakfast has been looking at the challenges shops face and the techniques stores use to encourage us to part with our cash.

Selling products at a discount is one approach, but it has always been a tricky balancing act between attracting customers and making a profit.

One idea, which is more than a century old, is proving more popular on UK high streets than ever.

The BBC's Tim Muffett's reports.