Meeting two couples who can't stop having babies and asking why not. Noel and Sue Radford from Morecambe in Lancashire have 14 kids and are expecting baby number 15. Strict Catholics Tania and Mike Sullivan from Kent have nine children between them and are expecting twins. Follow their highs and lows, including a family holiday for 16 and a look at how feeding everyone is like running your own canteen.

The Lewis family from Bournemouth have 12 daughters and one son. They're a family of beauty queens with the girls vying for the top beauty queen prizes, sometimes in direct competition with each other. Mum Tracey works hard to help them win accolades at pageants and parades. Then there's the Bland family, where children from different relationships are struggling to live together harmoniously under one roof.

The Hamlins and their ten kids struggle to make their big family work financially. Jo Watson, mother of 13, copes with being a single mum, and the sneering perception of her big brood sponging off the state, while the Hann family believe that more kids makes you stronger and happier.