Season 1 2015

The programme that goes behind the doors of million-pound properties returns for a new series. The homes Britain's growing number of property millionaires can get for their money vary wildly across the country. In central London, singing estate agent Toby Brown tries to sell a million-pound flat with a kitchen the size of a cupboard. In Lancashire, self-made millionaire Dwayne Hill grew up on a rough housing estate, but now finds he can afford a stately home in Scotland. Meanwhile, off the North Wales coast, Robin and Iona Beckmann have spent five years trying to sell a working lighthouse with panoramic sea views.

Lily, who's 22, goes house hunting armed with a million-pound trust fund. Meanwhile, on the Isle of Wight, an eccentrically decorated B&B has been on the market since 2008, but can't find a buyer.

With rare access to the super-prime property market, this documentary visits Britain's most exclusive homes, from a £20 million Mayfair townhouse to a 13th-century moated castle in Staffordshire.