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.

The heat continues with the four remaining celebrities fighting for a place in the semi-finals. The first challenge they face is a knowledge and skills test, where they have to demonstrate their ability to identify a tray of ingredients, three root vegetables and three birds before being asked to cook a duck breast with swiss chard and a caper butter sauce. The celebrities are then split into teams and are sent out on a mass-catering challenge, which sees them making lunch for staff and players at The Oval cricket ground. With an array of ingredients, the two teams must devise, prepare and serve the lunch. It is then back to the MasterChef headquarters as the battle for semi-final places reaches its climax. The celebrities must cook a faultless two-course meal that will not only be judged by John and Gregg but also by 2016's Celebrity MasterChef champion Alexis Conran and finalists Louise Minchin and Sam Nixon. Only the best two contestants can earn a semi-final place.