Clapham House Group, the listed operator behind Gourmet Burger Kitchen, has received a preliminary approach from an unnamed source – however the bidder is widely believed to be Capricorn Ventures International, owners of Nando’s, which already owns a 27% stake. In a statement to the London Stock Exchange it said: “The board of Clapham House notes the recent movement in the company's share price and confirms that it has received an approach which may or may not lead to an offer being made for the company. “There can be no certainty that an offer will be made for the company or the terms on which such an offer may be made.” Shares in the AIM-listed group, which has a market capitalisation of £30.37m, are up by 12p or 19.35% at 74p. Separately, shareholder Justin Kennedy increased his direct interest in the operator on the 23 July to 8.48%. Kennedy, a former Deustche Bank trader based in the Far East, also owns the Pizza Express franchise in Hong Kong.