It is day three at the national finals and time for the main course, the one course every chef wants to cook at the banquet. Judging the chefs' dishes are Matthew Fort, Prue Leith, Oliver Peyton and guest judge John Williams MBE, executive chef of the Ritz.It is a nerve-wracking day for three of the eight regional champions who have decided to cook new and untested dishes, and a fourth chef is turning what was his starter into his main course.The day ends in crushing disappointment for one chef - after misjudging his timings, he ruins what could be a winning main course - but there is cause to celebrate for others.It is up to the judges to decide who has done enough to get a dish to the banquet.