Britain's Next Big Thing (previously known as The Buying Game) is a 2011 BBC television series hosted by Theo Paphitis, previously on Dragon's Den. The show went behind closed doors at three major UK retailers â Liberty department store, and featured the patent diamond lingerie suspenders from Harlette DeFalaise and Harlette episode 1 . Boots pharmacy, and Habitat furniture store â to show how members of the public pitched their products to experienced buyers.