SERIAL killer Joanna Dennehy threatened to kill Rose West minutes after she arrived in the same prison as the House of Horrors murderer, it has been reported.

Dennehy and West, the only women in Britain currently serving life sentences, were both caged at HMP Bronzefield in Surrey.

But West was allegedly taken solitary confinement before she was transferred to another prison the following day, as prison guards feared the worst.

Criminologist and author Christopher Berry-Dee, who interviewed both women, explained that Dennehy was keen to become a "top dog" at the Surrey prison.

Mr Berry Dee told the Mirror: "Between five and 20 minutes after first arriving at Bronzefield in 2014, she said she was going to kill Rose West.

"Dennehy quickly established herself as the shot-caller. She has guards and inmates at her back and call."

Mr Barry-Dee who met Dennehy in July 2014, said he was disturbed by her charming persona which had a hint of coldness.

Dennehy, who is currently serving a life term in prison for violently stabbing three men to death, is known as one of the country’s most notorious female killers.

West her husband Fred became reviled public figures after the bodies of several women were found buried at their Cromwell Street home in Gloucester. She was later convicted of 10 murders.

Sources at HMP Bronzefiled once claimed Dennehy bragged to other inmates that she killed four people, not three.

An ex-lag said Dennehy, serving a whole-life tariff, leads a pampered existence and has a cell full of sick fan mail.

Rose West is currently imprisoned at HMP Low Newton, Durham, where guards are said to be protecting her from other inmates.

Prisoner Julie McAllister claimed she pummelled West after being infuriated that she was getting fan mail behind bars.