In this last semi-final, the four remaining contestants have two and a half hours to produce their best three-course menu.

However it's not only John and Gregg they need to impress. They are cooking lunch for a restaurant full of the country's most revered food critics, a challenge even the most seasoned chefs would balk at.

Over the years, MasterChef stalwart critics Charles Campion, Jay Rayner, Tracey MacLeod and William Sitwell have judged many plates of food during the competition, but tonight they are joined by a further eight renowned food experts, all with equally high standards.

Only the very best can earn a place in the final three and take that crucial step closer towards being crowned MasterChef Champion 2013. Show less