The second heat continues with the four remaining celebrities facing three more culinary challenges, as they battle for a place in the semi-finals. The first challenge is the new Pairs Challenge, where the four celebrities are split into two teams of two. Each team is tasked with cooking the same dish. Both plates must be identical in appearance and flavour, but there is a catch - in-between each pair there is a wall. The only way for the celebrities to successfully produce identical plates is by communicating with their teammate through the wall.

The celebrities are then sent out on their first mass-catering challenge. Remaining in their teams they have to make lunch for over 100 members of staff at Chessington World of Adventures. With an array of ingredients, including diced lamb, chicken legs and pollack, as well as a range of fruit and vegetables, the two teams must devise, prepare and serve the lunch, catering for various tastes and creating meat-based, vegetarian and dessert dishes in volume.

Then it's back to the MasterChef kitchen as the battle for a semi-final place reaches its climax. The four celebrities must now cook a faultless two-course meal that will not only be judged by John and Gregg but also by 2017's Celebrity MasterChef finalists Dev Griffin and Ulrika Jonsson and champion Angellica Bell. Only the best two contestants can earn a semi-final place and come one step closer to winning the title of Celebrity MasterChef 2018. For those who don't make the grade, the journey ends here. Show less