What power to restaurant critics have?

The restaurant critic Giles Coren's new series the Million Dollar critic on BBC America wants to take the power of the critic to a new level.

But what need is there in the days of bloggers and social media for professionals to review and rate restaurants? Giles Coren and the Independent's restaurant critic, Tracey MacLeod, debated their own importance.

Tracey says critics offer a more measured view after the initial wave of publicity launch and buzz while Giles seeks to make or break a restaurant with his "thundering fist".