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There is no Next Episode of Inside the Factory planned.
Gregg Wallace receives a load of corn fresh off the boat from Argentina and follows its journey through the largest breakfast cereal factory in Europe as it is cooked, milled and flavoured to become Crunchy Nut Cornflakes. He discovers how they can produce more than a million boxes of cereal every 24 hours and distribute them all over the globe. Meanwhile, Cherry Healey finds out about the immunity-boosting powers of vitamin D, which is added to many of our breakfast cereals. She also discovers the effect that skipping breakfast has on our cognitive function - studies show that breakfast skippers perform 7% worse in attention tests. And historian Ruth Goodman sits down to a Victorian breakfast of lobster and pig's head to reveal how the average Victorian was gorging down a mind-boggling four and a half thousand calories a day and that breakfast cereal was invented as a healthy alternative.
The British love eating crisps. So much so that we get through a staggering half a billion crisps a day - and that takes 17 million potatoes. So why do we love the humble fried potato snack so much, and what are the secrets behind making the perfect crisp?
In the second episode of Inside The Factory, Gregg Wallace and Cherry Healey go in search of these answers and discover plenty of surprising facts along the way.
We'll see Gregg at the largest crisp factory on earth - Walkers factory in Leicester - as he follows 27 tonnes of potatoes as they are peeled, sliced and fried to make more than five million packets of crisps every 24 hours. He'll discover how each bag is filled with nitrogen to keep the crisps from going stale - and if you ever wondered how a crisp gets it flavour then we'll get to see the inside of the factory's development kitchen, where seasoning begins its crisp life as a real food dish.
Meanwhile Cherry Healey discovers the secrets of perfect crisp potatoes, and how it is all down to a potato's sugar content. She also finds out that our noses play a central role in how things taste and ambiance can be as big factor as ingredients. Plus she follows the production of Monster Munch, where the factory transforms 96 tonnes of corn into 12 million monster feet every single day.
And historian Ruth Goodman investigates who really invented the crisp: was it the Americans, as is often cited, or the British? Ruth cooks up the earliest known recipe for crisps to uncover the truth.
Today in the UK we get through more than two million cans of baked beans every day, with the average UK household consuming 10 tins of canned food a week. Gregg Wallace helps to unload 27 tonnes of dried haricot beans from North America and follows them on a one and a half mile journey through the Heinz factory in Wigan - the largest baked bean factory in the world - making more than three million cans of beans every 24 hours.
He'll discover how a laser scrutinizes every single bean; how the spice recipe for the sauce is a classified secret known only by two people; and, most surprisingly, how the beans are not baked at all!
Meanwhile Cherry Healey follows the journey of her discarded baked bean can through a recycling centre and onto the largest steelworks in the UK, where she watches a dramatic, fiery process that produces 320 tonnes of molten steel - enough to make eight million cans.
She also takes a can that is 14 months after its ‘Best Before' date to a lab at the University of Coventry and is amazed when tests reveal it has the same Vitamin C levels compared to fresh tomatoes. The lab also proves that a 45 year-old tin of Skippers is still fit to eat.
And historian Ruth Goodman looks at how tinned food was invented to improve the nutrition of sailors to prevent them developing scurvy on their long voyages at sea. She'll also relate how Henry Heinz first marketed baked beans in the UK in the early 1900s - making them a family favourite.
Brompton's bicycle factory in West London is the largest in Britain, producing 150 of its distinctive folding bicycles every 24 hours.
In the fourth episode of Inside the Factory Gregg joins a multi-stage manual production line to make his very own bike. He'll learn how to put together 1200 individual parts. He'll also attempt to braze a bike frame together using extreme heat of a thousand degrees, a skill that takes years to master. He'll visit a leather saddle maker in Birmingham that's been making saddles for 150 years and discover how they use cowhide from UK and Ireland cows because the cold weather means they have thicker skins.
Meanwhile, Cherry Healey gets some tips from Cycling Team GB to help us all improve our pedal power. She also learns how to paint a bike frame fit for the British weather using an electro-static charge and a 180 degree hot oven. Cherry also investigates why cyclists and trucks are such a deadly combination: in London alone there have been 66 fatalities since 2011 and half of them were collisions with a truck.
And historian Ruth Goodman reveals that folding bikes date back to the 1870's, and how 70,000 folding 'parabikes' were manufactured during World War II, some of which played a role in the D-Day landings. She'll also find out how the invention of the safety bicycle in the late 1880's was used by Suffragettes to ride to rallies and spread the word in their fight for equality.
Gregg Wallace helps to unload a tanker full of sugar from Norfolk and follows it through one of the oldest sweet factories in Britain to see how over 500 workers, as well as some mind-boggling machines, transform it into over a hundred million individual sweets within just 24 hours. He discovers how the factory that produces Lovehearts could be the most romantic in the world because one in four of the people who work there are in a relationship with each other, how they make 5,000 Fizzers a minute using a tablet-pressing machine that uses 3 tonnes of pressure to create each sweet, and meets the man in charge of making three quarters of a million Fruity Pop lollies every day.
Meanwhile, Cherry Healey is let inside the research and development department and experiences for herself how hard it is to come up with a new product, as she attempts to invent her own version of sherbet using citric acid and sodium bicarbonate. She also finds out how they put the letters in seaside rock by making a giant version and then stretching it to the right size, and is given special access to the Fisherman's Friend factory in Lancashire to discover how a local family turned a niche product into a worldwide success.
And historian Ruth Goodman investigates how sweets were first invented and discovers that, in the Middle Ages, they were used as a medicine and thought to reduce flatulence. She also finds out about the human cost of Britain's sweet tooth in the 18th century and how an abolition movement instigated a sugar boycott which helped to end the slave trade.
Documentary series. Gregg Wallace joins a human production line in the largest sports shoe factory in the UK to see how they produce three and a half thousand pairs of trainers every 24 hours by sewing 32 million individual stiches and using 140 miles of thread. Meanwhile, Cherry Healey gets hands on in a tannery to help them process thousands of rawhides into finished leather for the nation's shoes, and finds out how a ballet shoe company painstakingly turns 37,000 square meters of satin into a quarter of a million ballet shoes - some of which only last for one performance. She also gets to design her own court shoes at Cordwainers College in London. And historian Ruth Goodman reveals how, when the sewing machine was first introduced into shoe factories in the mid 19th century, traditional shoemakers went on strike, rebelling against joining a restrictive production line. She also traces the surprising origins of the humble trainer.