[Chocolate]

Production staff at the Big Brother house have been told to keep an eye on Lisa in case she has any more violent outbursts.

They fear that Lisa, who threw a bike in an argument last Friday, may snap and end up punching a housemate.

An insider told The Sun: “Production are in fear of Lisa.

“They think she’s close to doing something violent and dread a repetition of BB5 when Victor went mental.

“She is always talking of ‘doing things’ to other housemates. This may be coming to a head as she is about to run out of cigarettes.”

Another insider told the paper that the alchohol supply has been limited to avoid the already bitchy atmosphere becoming worse.

A show spokesman said: “Big Brother constantly watches all the housemates to ensure their safety.”