Kamil's businesses turn over £3m a year and he makes over £40,000 profit every month, while his partner Francesca runs a successful lingerie company. They trade places with Derbyshire couple Mel and Sophie and their seven-month-old son Teddy, who live in a three-bedroom rented property in Derbyshire and exist on just £56 a week after bills for all their shopping and travel.

Single mum Geri has moved from job to job while struggling to raise daughter Scarlet and lives on under £60 a week, while millionaire businesswoman Debi has money but no work-life balance. For one week they're swapping lives, homes and budgets to find out if money really does buy happiness, with Geri heading to a luxury 18th-century home in Kent, while Debi lives in a ground-floor flat in Shoreham-on-Sea, West Sussex.