A man was repeatedly hit with a radio aerial by a complete stranger who turned up at his flat.
The 60-year-old victim was beaten with a CB radio aerial by Jonathon Colraine, who shouted he was going to kill him.
It happened in the victim’s 15th floor flat in a tower block at Charles Court, Layton.
Colraine, 23, of Bedford Road, North Shore, who spoke of having a split personality, was made the subject of a hospital order and a restriction order to protect the public from serious harm, at Preston Crown Court.
Colraine admitted offences of assault occasioning actual bodily harm and theft.
Nick Kennedy, prosecuting, said he spoke to a woman in her 20s in the lift of the tower block in February last year.
She suggested she would see him later.
Around 90 minutes later she returned with a man in his 60s.
After they left there was a loud bang at the door.
Mr Kennedy said: “The victim was confronted by the defendant, who was a stranger.
“The defendant was aggressive towards him from the outset. He went on to shout ‘what do you think you are doing taking my girlfriend into your house?’
“Fearing he might be attacked, the victim reached for the antennae from a CB radio and used it to try to get him out of the flat.
“The defendant disarmed him, threw him to the floor and then used the antennae to beat him several times with it.”
He went into the kitchen and returned with a large knife and threatened the victim.
Colraine, who had 34 previous offences, took a lap top and a tub containing £15 before leaving.
A consultant forensic psychiatrist said the defendant’s paranoid schizophrenia had been responding well to treatment. The restriction order was made without time limit.