Melanie Goldsmith, 26, UK

Melanie Goldsmith's alcoholic sweets are now sold in high-end London high street stores after she made them for a dating event she ran. Her company Smith and Sinclair has created edible cocktails for more than 32 brands of alcohol.

Her advice for would-be entrepreneurs: "Make sure people buy into your idea and not just in theory but will hand over their money. The best move we made initially was selling our products with no name/ brand/ info/ marketing in central London on a market stall as we were able to get a strong understanding of what people saw the value of our product being. You're only worth what someone will pay!"

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