Llewelyn-Bowen said the show's set reminded him of a "panic room"

The set - shown to the press ahead of Thursday's launch - was "a lot less well behaved" than previous years, the Changing Rooms host told the Guardian.

The house is dominated by glass and an "inside out" theme, with a carpeted garden and grass in the kitchen.

Meanwhile, the Sun says there will not be enough beds for all 12 contestants.

The newspaper claims there will be three double beds, one more than last year.

'More twisted'

Producers of Channel 4's reality show have promised Big Brother 7 will be "more twisted than ever" during its 13-week run.

Producers say the contestants will be more exposed than ever

They have deliberately included several glass walls and mirrors so contestants feel exposed and insecure while they are together.

Llewelyn-Bowen described the interior as resembling "glass-fronted, boudoir-inspired, flock-printed panic rooms".

He said a dining table and stools - placed outside in keeping with the back-to-front theme - were "exquisite, absolutely beautiful, really refined, terribly elegant".

Overall, the look was "about wit and irony", he said, and people would be "enormously interested" in it.

A member of the public will be admitted to the house as a competition winner.