It's every sweet-toothed person's dream to have a house full to the brim of their favourite chocolate bars.

But one Sutton man's liking for KitKats turned into an obsession after he bought more than 100,000 bars in the hope of winning the top prize in a competition.

David Styles, who lives in Tormead Close, spent about £5,000 snapping up multipacks of two-fingered KitKats from shops around the borough to enter a prize promotion organised by Nestl Rowntree, the chocolate bar manufacturer.

The company sparked a bidding war after it launched its KitKash competition where customers collect wrappers to use as points in an online auction.

Top prizes, worth more than £10million, including cars and exotic holidays were on offer.

Mr Styles, who works as a computer contractor, said at first he only spent a few hundred pounds on buying KitKats before he began to take the competition seriously. "At one point I couldn't find a two-fingered multipack of KitKats anywhere because I'd bought so many."

Using the proceeds of his first prize, a plasma television, to buy more bars Mr Styles said he has since won a Peugeot 306 car, worth £15,000, as well as televisions and holidays around the world. Despite his success, Mr Styles said he and his wife are now struggling to get rid of the mountain of KitKat bars.

He added: "We've still got about 400 carrier bags left with about 200 bars in each one we've started giving them away to people like the London Fire Brigade and Sutton Volunteer Bureau. Both my wife and I really love KitKats and if the bars had longer dates on them we would probably eat the lot."