BERWYN prison is among a minority of jails not breaching its inmate limits, amid calls for prisoners in crowded facilities elsewhere to be released to prevent coronavirus deaths.

Pressure is being put on Justice Secretary Robert Buckland to allow convicted criminals to head home, after Northern Ireland signalled it would let out more than 10 per cent of those behind bars.

Ministry of Justice figures show that none of the 1,189 prisoners at HMP Berwyn were doubled up in cells designed for just one inmate in 2018-2019.

It was one of 45 prisons which did not report any instance of overcrowding last year, while nearly two thirds of prisons in England and Wales had multiple inmates living in single-occupancy cells.

Calls for action from human rights groups and a prisons watchdog came as the Ministry of Justice confirmed that 65 prisoners had tested positive for coronavirus in 23 different prisons, as of Monday (March 31).

Jails across England and Wales have been put on lockdown with all visits cancelled, however, it's feared that prison crowding could lead to jails becoming overwhelmed by the coronavirus pandemic.

Staff numbers in prisons are already stretched, with around 3,500 employees, representing about a tenth of the workforce, currently in self-isolation due to Covid-19.

Nationally, the prison overcrowding rate fell to 22.5 per cent in 2019, from 24.2 per cent in 2018.

Crowding was particularly concentrated in male local prisons, which usually serve a court in the local authority area and predominantly hold remand and short sentence prisoners.

The Independent Advisory Panel on Deaths in Custody said prisons should be only for "serious and violent offenders" at this time.

Juliet Lyon, IAPDC chairman, said: "Ministers and officials are faced with some of the most difficult decisions they have ever had to make, about balance of risk and the best ways to keep people safe.

"In an unprecedented public health crisis, it is not fair or proportionate to commit prisoners, and staff responsible for them, to try to survive in insanitary, overcrowded institutions devoid currently of independent oversight."

Kate Allen, director of Amnesty International UK, said that decreasing the prison population and the number of people in immigration detention centres is a "crucial means of slowing the spread of Covid-19".

At the end of March, the Government announced that pregnant women in custody who don't pose a high risk of harm to the public would be temporarily released from prison on an electronic tag, to protect them and their unborn child from coronavirus.

A Prison Service spokeswoman said: "We have robust and flexible plans in place to protect the lives of our staff, prisoners and visitors, based on the latest advice from Public Health England and the Department of Health and Social Care."