Sauces

S3, E5: Gregg Wallace is in the Netherlands at one of the world's biggest sauce factories. Its annual output is a quarter of a million tonnes of condiments, and more than 50 per cent of this heads to the UK. Meanwhile, Cherry Healey is making the glass jars Gregg needs for his mayonnaise. She's at a vast factory in Maastricht where a furnace holding 250 tonnes of molten glass has been running continuously for the last 11 years.