This week's heats continue with the four remaining celebrities facing two more culinary challenges as they battle for a place in the semi-finals.

The pairs challenge returns in tonight's first round, as the four celebrities are split into two teams of two, in a test of teamwork and communication. Each team is tasked with cooking the same dish. Both plates must be identical in both appearance and flavour, but there is a catch: between each pair there is a wall. The only way for the celebrities to successfully produce identical plates is by communicating through the wall.

The celebrities are then sent out on their first mass catering challenge. Remaining in their teams they will have to make lunch for over 100 members of staff at London Zoo.

This second heat week sees five more celebrities enter the MasterChef kitchen. with Dom Parker, Josie Long, Mim Shaikh, Jenny Ryan and Alex George facing three culinary challenges. They first tackle an invention test, before they are split into two groups to take on the challenge of cooking for the first time in a restaurant kitchen, preparing dishes for paying customers. In the final task they are asked to prepare a dish of their own design in just one hour, before judges John Torode and Gregg Wallace decide which of the contestants will leave the competition.