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This week sees the heats for London and south east England. Returning to the competition is Surrey-based Tony Parkin, who runs his own Michelin-starred restaurant, Tony Parkin at The Tudor Room. He is joined by Essex-born Spencer Metzger, a Roux scholar and head chef at the Ritz in London, Robbie Lorraine, who grew up in Camberwell and owns Only Food and Courses in Brixton, and Japanese-born Angelo Sato, chef patron at his yakitori restaurant Humble Chicken in Soho.

Presenter Andi Oliver welcomes them to the kitchen, where the theme for this year鈥檚 competition is a celebration of 100 years of British broadcasting. One of the four must leave the competition at the end of the episode, to be decided by this week鈥檚 veteran judge - a previous winner who remains a surprise to the chefs until the moment they walk into the kitchen to taste the first-course canapes.