Inquisitive Big Brother 8 contestants will be rewarded with a secret luxury room, according to a report.

A secret tunnel leading to a reward room has been dug in the garden for the new series. Housemates will not be told about its existence, but producers hope that a hidden doorway leading to the tunnel will eventually be discovered.

An insider told the Daily Star: "If they're dopey housemates, the tunnel and secret room will remain untouched for the whole summer."