The Restaurant Group, formerly City Centre Restaurants, has extended its offer for Ask Central for a further seven days to February 2, as valid acceptances hit 47.8%. The company now needs 2.3% more of acceptances for its £181m cash-and-shares offer to see off any possibility of a bid from the private equity firm TDR Capital, which said last week it is ready to table a 220p a share cash-only bid for the group, valuing Ask at £212m . TDR, backed by Capricorn Ventures, its partner in the rival restaurant chain PizzaExpress, says its bid will be put in front of investors in the next two weeks. Restaurant Group's bid still has the endorsement of the Ask board, including founders Adam and Samuel Kaye. However, a source at TDR has been quoted as saying it is comfortable that it had bid at a level where it was relatively unlikely that the Restaurant Group would come back. On the prospect of the Restaurant Group gearing up to top TDR's offer, the source told the Mergermarket news service: "It's just more difficult to have a heavily leveraged company in the public market. The business they're putting [Ask Central] together with is smaller than PizzaExpress." The source said that ultimately, the Restaurant Group was offering a share and cash mix and it was highly unlikely that it would be able to offer a 100% cash offer as favourable as TDR's.