Michael Adebowale, 28, is one of the killers of soldier Lee Rigby

One of the men convicted of murdering soldier Lee Rigby was today jailed for a further eight months after he admitted attacking a nurse in Broadmoor hospital.

Michael Adebowale, 28, pleaded guilty to punching a healthcare assistant while being held in the secure hospital in Crowthorne, Berkshire, on July 20 last year.

After denying a more serious charge of inflicting grievous bodily harm, Adebowale admitted an alternative charge of assault causing actual bodily harm at Reading Crown Court today.

Adebowale was given a eight-month prison sentence by Mr Justice Jay which will be served after his 45-year minimum term for the murder of the Fusilier in Woolwich, South East London, in 2013.

He is currently serving his sentence at Broadmoor and is expected to stay there for the next few years to be treated for paranoid schizophrenia.

Adebowale admitted assaulting a nurse at Broadmoor Hospital in Crowthorne, Berkshire

Mr Justice Jay said: 'There is only one previous conviction but it is a significant one.'

Adebowale and Michael Adebolajo ran over the 25-year-old soldier close to Woolwich barracks in May 2013 before stabbing him to death in broad daylight.

Rigby was attacked and killed near a barracks in Woolwich, South East London, in May 2013

The father of one died as a result of multiple cut and stab wounds after the attack fuelled by Adebowale and Adebolajo's extremist beliefs described as a 'betrayal of Islam' at their murder trial in 2014.

Adebowale has spent three periods in Broadmoor since his conviction, and is expected to spend the next 'five or ten years' in the hospital, the court heard.

Adebowale, who has changed his name by deed poll to Ismaail Kuti, appeared via video link from the secure hospital for the hearing.

Sarah Whitehouse QC, prosecuting, said that Adebowale punched the nurse in the jaw during the incident in a day room of the hospital.

Ms Whitehouse said the attack was triggered after Adebowale was asked to turn down the volume of a television he was playing music through.

Adebowale was 'plainly upset and annoyed' by the request, she added.

Bikers pay tribute to Fusilier Rigby outside the Woolwich Royal Artillery Barracks in May 2014

CCTV footage shown in court showed Adebowale approaching Jason Taplin before punching him and knocking him to the ground.

Adebowale and Michael Adebolajo (pictured) ran over the 25-year-old soldier in May 2013

Mr Taplin was taken to hospital and examined. After it was disputed whether the injury had broken the bone, Adebowale was able to plead guilty to the lesser charge and avoid a trial.

Sasha Wass QC, defending, told the court Adebowale admitted hitting Mr Taplin when frustrated but did not break the bone.

She said: 'He accepted that he struck a blow, one blow, but he did not or he would not accept that he broke the jaw.'

Ms Wass added that Adebowale suffers from 'chronic paranoid schizophrenia' and was hearing voices telling him to attack Mr Taplin before the incident.

She said: 'He is clearly unwell, he clearly had a lapse in self control and he regained his self control and he immediately showed his remorse by writing a letter to Mr Taplin.

'His medication was not sufficient to deal with the psychotic state he experienced on July 20 of last year and as a result of that state he administered the blow.'

The judge said in court today that Adebowale 'may in fact never leave Broadmoor' (file picture)

Mr Justice Jay said his sentencing decision will not significantly affect the 28-year-old's immediate future.

'He has got another 39 or 40 years to go and may in fact never leave Broadmoor,' he said.

Passing down the eight-month sentence, Mr Justice Jay said: 'There was a dispute between you and Mr Taplin. I have absolutely no doubt Mr Taplin was in the right and you were in the wrong.

'What the CCTV clearly shows, that while Mr Taplin was in conversation, no doubt of work-related matters, you approached him from his left and on my interpretation of the evidence you delivered one hard blow.

'It was a combination of the illness and the stress that was working on your mind that I feel was another factor in your case.'

Adebolajo and Adebowale were bundled from the dock at the Old Bailey after they brawled with court officials as their sentencing hearing in February 2014 descended into violence

Mr Justice Jay accepted that Adebowale had heard voices before the attack.

'The injury would have been very painful for a period of time, possibly a considerable period of time and I hope you sincerely regret that.'

After serving his life sentence, Adebowale will serve half of the eight-month prison sentence before being released on licence.

A further count of inflicting grievous bodily harm will lie on file.

Following the sentencing, a Broadmoor spokesman told MailOnline: 'The safety of staff and patients at Broadmoor Hospital is paramount. When assaults on staff or other patients take place, we always report these to the police.'