The ads are designed to raise awareness about the housing gap

The shock adverts from housing charity Shelter depict the "appalling conditions" faced by many families.

The ads, part of the charity's Real Homes campaign, will feature next to Douglas and Gordon's genuine million-pound properties.

"More and more people are facing homelessness and housing problems," said Shelter director Adam Sampson.

The price of a house in Kensington would have bought two in Leven, Scotland in 1994. Twelve years on, it would buy 24, according to Shelter.

It said the campaign was designed to wake people up to the "huge housing gap that has opened up across the country, and particularly London".