Gregg Wallace steps inside a huge Yorkshire puddings factory in Hull to learn how Aunt Bessie’s produces a staggering 500 million Yorkshire puddings every year.

Gregg Wallace visits a jelly beans factory in Dublin to reveal the astonishing processes used to make ten million of these colourful little sweets every day.

Gregg Wallace visits two factories in Italy and Wales to learn how denim cloth is made and then transformed into one of the world's most popular items of clothing - jeans.

Gregg Wallace visits a food factory in Hertfordshire that produces 500 million parcels of stuffed pasta every year.

Gregg Wallace visits a huge brewery in Dublin to learn how two million litres of an iconic Irish stout are produced every day.

Gregg Wallace visits the colourful and fragrant Lush factory in Dorset to learn how an astonishing 14 million bath bombs are produced every year.

Gregg Wallace visits a huge carpet factory in Devon to learn how it weaves 46,000 square metres of carpet every year.

Gregg Wallace visits an enormous factory in York to learn how millions of peppermint-flavoured bubbly chocolate bars are produced every year.

Gregg Wallace is in West Yorkshire, visiting a huge factory that makes more than 5,000 sofas every year. Meanwhile, Cherry Healey learns about the science of light bulbs.

Gregg Wallace visits a colourful factory that produces 200,000 litres of paint and 10,000 metres of wallpaper every week.