Andi Oliver presents the series finale – an outdoor banquet celebrating British innovation and invention. The star-studded guests must vote for the overall winning chef.

The eight regional champions cook their desserts in a bid to secure a place on the menu of a banquet celebrating British innovation. Comedian Ed Gamble is the guest judge.

The eight regional champions cook their main courses in a bid to secure a place on the menu of a banquet celebrating British innovation. Carol Vorderman is the guest judge.

The eight regional champions cook their fish courses to win a place on the menu of a banquet celebrating British innovation. Engineer and TV presenter Zoe Laughlin is guest judge.

The eight regional champions cook their starter courses in a bid to secure a place on the menu of a banquet celebrating British innovation. Comedian Phill Wang is the guest judge.

Who will be judged the winner for the south west of England with innovative dishes inspired by the region's inventions? The judges, including a modern-day madcap inventor, must decide.

The remaining chefs compete over dishes inspired by science and innovation from the south west of England, but who will win and who must go home?

Four chefs from the south west of England compete, with canapes, starters and fish dishes inspired by British invention and innovation. Who will be eliminated?

Who will be judged the winner of the North West of England with delicious dishes celebrating invention? The judges, including one of Britain's best loved designers, must decide.

The remaining chefs compete with dishes inspired by British invention and innovation, but which two chefs will go through to the judges' chamber and who must go home?

Four chefs compete for the North West of England with canapés, starters and fish dishes inspired by British invention and innovation.

Guest judge and legendary designer Thomas Heatherwick helps decide the winner from the two remaining chefs. Both have pioneering dishes, but whose will rocket them to success?

The remaining chefs compete over dishes inspired by science and innovation, drawing especially from Northern Ireland's legacy of inventions. But who will win and who must go home?

Four top chefs compete for Northern Ireland with canapes, starters and fish dishes inspired by British invention and innovation. But who will be eliminated?

Guest judge Sophie Conran, cook, author and designer, helps decide the winner from the two remaining chefs. Both have truly pioneering dishes but who will take the crown today?

The remaining chefs compete over mains and desserts inspired by science and innovation. But with such high-level cooking, who will finish in front and who must go home?

Four chefs compete for the North East, Yorkshire and Humber region with canapes, starters and fish dishes inspired by British invention and innovation.

Two top chefs from Wales go head-to-head with dishes celebrating Welsh produce, Welsh entrepreneurs and pioneers in their fields. But who will come out on top?

The remaining chefs compete over dishes inspired by science and innovation but when two chefs go head to head with lamb dishes – who will win and who must go home?

Four chefs compete for Wales with canapes, starters and fish dishes inspired by British invention and innovation. Who will be eliminated?

Today the two highest scoring chefs from the London and the South East region must go head to head and cook their six-course menus again. But will they take on board their veteran's advice as they serve both the panel of judges and one of Britain's foremost geologists?

The chefs need to impress the formidable judges, food writer Matthew Fort, restauranteur Oliver Peyton and broadcaster and food creative Rachel Khoo, as well as a guest judge. In this episode, it's Professor Chris Jackson, a geologist and intrepid adventurer. He judges dishes celebrating British science and innovation, including a lobster dish inspired by a computer algorithm celebrating Ada Lovelace and a dessert paying homage to the discovery of DNA.

The three chefs are halfway through their heat and the pressure is mounting. Once again, they each serve a unique take on the brief celebrating British invention and innovation. Whose inventions in the kitchen will veteran judge Paul Ainsworth consider the best?

Only two will proceed to Friday's judging and have a chance to represent the London and the South East region at the regional finals.

Four top chefs compete for the ultra-competitive London and the South East region with canapes, starters and fish dishes. All four are newcomers in the GBM kitchen, representing some of the most exciting new talents in the UK today.

Presenter Andi Oliver welcomes them to the kitchen, where the theme for this year's competition is a celebration of British invention and innovation. One of the four must leave the competition at the end of the episode, as decided by this week's veteran judge.

 The two highest scoring chefs from Scotland go head-to-head to cook their six-course menus again. But will they take on board their veteran's advice as they serve the panel of judges, including a guest judge who is the author of a bestselling science book?

The chefs need to impress the formidable judges: food writer Matthew Fort, restaurateur Oliver Peyton, broadcaster and food creative Rachel Khoo, and guest judge Caroline Criado-Perez OBE, who won the Royal Society's Science Book prize. She is also well known as a feminist campaigner, whose book Invisible Women exposed the gender bias in science. She made history by successfully lobbying to get a woman put on the ten pound note, and the first woman statue erected in Parliament Square.

How will she judge dishes celebrating British science and innovation? Including the dishes from the Scottish chefs which celebrate women pioneers in medicine, as well as the Scottish invention of penicillin and others.

 The three chefs are halfway through their heat and the pressure is mounting. Each one wants to represent Scotland at a banquet celebrating British invention and innovation. For mains, one chef honours Logie Baird's invention of television with a very upmarket take on a TV dinner, and another celebrates Scotland's successful cloning of Dolly The Sheep. A third chef cooks an ambitious multi-layered pie of beef and chicken with a beef consomme, in homage to the Scottish inventions of Bovril and the hip flask. But whose inventions in the kitchen will veteran judge Tom Brown score highest?

Next, presenter Andi Oliver asks the chefs to prepare a pre-dessert or palate cleanser. Veteran judge Tom must blind taste and rank them as they will be used in the event of a tie to decide who goes home. There is a yogurt and berry sorbet coloured to look like a child's toy, and a celebration of Scotland's invention of the first commercial marmalade among the mini dishes to choose from.

After a surprise turn in fortunes on the first test of pudding skills, it is on to desserts, often laced with alcohol flavourings. One chef is celebrating a modern-day hero of the Scottish brewery industry with a chocolate and whiskey dessert, while another is celebrating Alexander Fleming's invention of penicillin with a cocktail and ginger cake shaped as individual giant pills. But which chef will prove they have the winning formula to get the top marks? And who will go home?

Only two will proceed to Friday's judging and have a chance to represent Scotland at the regional finals.

Competing for the top spot are four chefs, three of them all known to each other as they all have their own restaurants in Edinburgh. There is a reigning champion from last year for Scotland, Roberta Hall, and she is joined by fellow capital chefs Stuart Ralson and Scott Smith. The fourth competitor is returner Amy Elles, who has a seafood restaurant by the coast in Fife. She lost out to Roberta in last year's Scotland final.

Presenter Andi Oliver welcomes them to the kitchen, where the theme for this year's competition is a celebration of British invention and innovation. Given Scotland's historic success with scientific discovery, the chefs have plenty of inspiration to draw upon, from the invention of television and toasters to penicillin.

One of the four must leave the competition at the end of the episode. Which one that is will be decided by the veteran judge of this week's competition, a previous winner who remains a surprise to the chefs until the moment they walk into the kitchen to taste their first course: canapes.

Veteran and Michelin-starred Tom Brown, a seafood specialist, tastes their canapes, which range from a cheese tart to a duck liver parfait.

The starter dishes draw upon Scotland's proud history of medical discovery and innovation, with a crispy shredded beef and Lanark blue cheese dish presented in a dish shaped like a giant petri dish to celebrate Alexander Fleming's invention of antibiotics, and another a homage to the 'Edinburgh Seven', the first women medical students at Edinburgh University. The other two starters both take as their inspiration the invention of 'family planning'. One, 'the birds and the bees', is a quail and honey dish, while the other uses aphrodisiac ingredients. But which will Tom score highest?

Then it is on to the fish course, veteran judge Tom's specialty. He has a traditional Cullen Skink soup served with turbot to try from Roberta, on a dish celebrating the work of Edinburgh born physicist James Maxwell. The dish is served on a colour wheel as an homage to his invention of the first colour photograph. Another lobster dish pays homage to Scottish scientific pioneer Mary Sommerville, and her work in the field of astronomy. But one chef must be sent home by Tom.

Guest judge Helen Sharman, Britain's first astronaut, helps decide the winner from the two remaining chefs. Both have dishes themed around space, but whose will rocket them to success?

The remaining chefs compete over mains and desserts inspired by science and innovation. But when two chefs both decide to make layered chocolate dishes, who will win and who must go home?

Four chefs compete for the central region with canapes, starters and fish dishes inspired by British invention and innovation. With a surprise extra judge, who will be eliminated?