A schizophrenic and regular cannabis user who attacked his girlfriend's mother so viciously that she had to have her face rebuilt has been jailed.
Lisa Voice was attacked in her own home
Peter Thomas, 21, was given three years for grievous bodily harm with intent at Middlesex Guildhall Crown Court but he must be deemed safe before release.
The judge said if he had not been ill he would not have attacked Lisa Voice, 52, at her north London home last June.
He said the illness was exacerbated by the defendant's prolonged cannabis use.
Thomas had smoked the drug from the age of 15 and had recently moved on to smoking skunk - a stronger strain of cannabis.
Ms Voice's 15-year-old daughter Kimberly had noticed his behaviour had become erratic in the days prior to the attack.
During the attack on Ms Voice, in St John's Wood, Thomas punched her and put her in a headlock making it difficult for her to breathe.
He finally ran towards her and jumped on her upper body and head.
She was left with severe injuries including a broken jaw and nose, a collapsed lung and damage to her eyes.
Grounds of insanity
Speaking outside the court Ms Voice said: "We are absolutely shocked and I am very disappointed. I am thinking about leaving the country.
"You can do anything and get away with it, if you use cannabis as an excuse."
Thomas had initially denied the grievous bodily harm charge, plus another two of assault and actual bodily harm, on the grounds of insanity.
He changed his plea to guilty to grievous bodily harm with intent and the other two charges will lie on file.