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A 13 year old schoolboy has invented a doorbell that can fool burglars by making them believe someone's at home.

The Smart Bell uses mobile phone technology to ring your mobile, allowing you to speak to the person at the door, giving the impression you're talking via an intercom.

It even adds realistic 'white noise' to fool would be thieves, who are known to try doorbells to check if anyone's home before attempting to break in.

The system could also handle delivery instructions, allowing you to talk to the delivery person i.e "please leave my parcel next door".

Laurence Rook says he came up with the idea after his Mum complained about having to keep going to the Post Office to collect deliveries that had been made while she was out.

Now he's on the brink of a £250,000 deal with a major telecoms company and his invention could soon be in high street shops like B&Q, PC World, Currys and Comet etc. with an expected retail cost of around £40.

Well done Laurence.