Des Gunewardena, chairman and chief executive of D&D Restaurants, said anticipation of the tax was already starting to hit revenues. He said that while revenues generally were up last week by about 10 per cent, and by as much as 25 per cent in the West End, in the City and Canary Wharf restaurants such as Coq d'Argent and Plateau they were down by 5 to 10 per cent.