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The week's heat continues with the four remaining celebrities fighting for a place in the semi-finals.

The first challenge is a knowledge and skills test, where the celebrities have to face judges John Torode and Gregg Wallace one by one and demonstrate their ability to identify a tray of ingredients, three different eggs and three different types of mushroom, before being asked to make a breakfast - a hash brown, crispy bacon and poached eggs - in just 12 minutes.

They are then split into two teams and are sent out on their first mass-catering challenge, for which they have to make lunch for 80 members of staff at Brooklands, site of the world's first purpose-built motor racing circuit and now home to Mercedes-Benz. With an array of ingredients, including diced lamb, salmon and beef mince, as well as a range of fruit and vegetables, the two teams must devise, prepare and serve the lunch, catering for various tastes while creating meat-based, vegetarian and dessert dishes in volume.

It is then back to the MasterChef headquarters as the battle for a semi-final place reaches its climax. The four celebrities must cook a faultless two-course meal that will not only be judged by John and Gregg but also by past Celebrity MasterChef champion Kimberly Wyatt (2015), finalist Rylan Clark-Neal (2015) and semi-finalist Richard Coles (2016). Only the best two contestants can earn a semi-final place and come one step closer to winning the title of Celebrity MasterChef 2017.