Knockout week continues and the ten remaining professionals are split into two groups. The contenders step out of the MasterChef kitchen for the very first time, cooking for their toughest crowd yet, and then return to compete for a place in the semi-finals.

In this edition, five chefs take over Market Halls in central London, which is the home of some of the country's most exciting and eclectic food pop-up stalls. The professionals take charge of the market and deliver their own tasty treats for 22 of the biggest movers and shakers in the pop-up scene. They have three hours to serve up one dish each for the diners, but the quality of the food leaving the kitchens will need to be world class. This is a chance to see how the chefs cope with working in cramped spaces and with unfamiliar equipment.

These diners know what it takes to succeed in this business, and their opinion on the culinary creations matters more than ever, as they will all vote on the dish that impressed them the most. The chef who cooks the winning plate of food will sail straight through to the semi-finals.

The verdict is delivered back at the MasterChef kitchen and the four who fail to come out on top will cook again. Their brief is a tall order: to prepare a dish that celebrates their favourite drink. Whether their inspiration is beer, fine wine or a cup of tea, the level of creativity will have to be through the roof, as the judges will be calling last orders for one unfortunate chef.

At the end, the best three will have cause to celebrate getting one step closer to becoming MasterChef: The Professionals Champion 2024.

It's the semi-finals. The past five weeks have seen the chefs whittled down to the best eight. Now, it's all about survival as they battle for a place in the last six.

Limiting food waste should be at the forefront of every chef's mind, so first up, the semi-finalists will be asked to create one dish which embraces either 'root-to-shoot' or 'nose-to-tail' eating. The professionals will choose one ingredient and serve it in as many innovative and exciting ways as they can, showing total respect for the produce selected.

The judges will then pick the contestants worthy of going straight through to the next round, leaving the others to face an invention test that will have them cooking for their MasterChef lives. Each professional will need to pick a box, under which lies a mystery seafood ingredient. Using the larder to complement it, they will need to create a dish that showcases and celebrates that ingredient.

The two who fail to hit the high notes will be sent home, leaving the rest with a one in six chance of becoming this year's champion.