"The coming year, therefore, may see restaurants shutting up on quite a scale, quite possibly exceeding the record number of 113, noted four years ago," he said.
"As more exciting and better restaurants open their doors, there is obviously greater pressure on unsatisfactory concepts, and on tired restaurants which are moving towards the end of their days.
"Rents go up as landlords take advantage of things going well, and competition for staff drives up staff costs. "As customers are deluged with evermore sophisticated offerings, they become more discerning so the market punishes failure faster," he said.
Harden's London Restaurants 2008 is published on 28 August. www.hardens.com