Bristol's Caddy family trade places with the Williams family from Weston-Super-Mare. The Caddys spend more than £1700 per week, compared to the Williams's £110 weekly budget, and it shows in a regimen of piano and tennis lessons, coffee mornings and regular meals out.

The Hays are in the wealthiest 10 percent in Britain. The Hellings are in the poorest 10 percent. How will they both adapt to each other's lives?