Paul Mutton in the BBC Breakfast studio
Media playback is unsupported on your device
Video

Marks and Spencer security breach in context

We are constantly warned to be careful with our personal details over the internet. But what can we do when they are stolen directly from the databases held by marketing companies?

This week Marks and Spencer contacted its online customers, warning shoppers of a security breach to their system. So should they be worried?

Paul Mutton, is an online security expert and he says ''people won't be at any immediate financial risk''.

Go to next video: Mixed message from the high street