Nineteen inmates broke out of their cells by using furniture to smash through “weak points” in the walls of a Victorian prison.

Police and specially trained prison officers rushed to HMP Winchester, in Hampshire, on Tuesday night after the inmates managed to escape their cells.

Four inmates are said to have used furniture to break “weak points” in the walls of their cells in B wing after manipulating mortar around the doors.

Initial reports said the escapees used plastic spoons smuggled from the kitchen to unpick the mortar – but the Ministry of Justice (MoJ) has since dismissed this claim.

The inmates reportedly then convinced 15 other prisoners on the same wing to break out of their cells.

UK prison conditions: in pictures Show all 8 1 /8 UK prison conditions: in pictures UK prison conditions: in pictures A cell covered in graffiti at HMP Liverpool. PA UK prison conditions: in pictures HMP Liverpool has some of the worst conditions inspectors have seen. HM Inspectorate of Prisons/PA UK prison conditions: in pictures A broken window in a cell at HMP Liverpool HM Inspectorate of Prisons/PA Wire UK prison conditions: in pictures A shower unit with protruding electric cable at HMP Liverpool HM Inspectorate of Prisons/PA UK prison conditions: in pictures Litter at HMP Liverpool HM Inspectorate of Prisons/PA Wire UK prison conditions: in pictures A wall damaged by damp at HMP Liverpool HM Inspectorate of Prisons/PA UK prison conditions: in pictures A pool table at HMP Liverpool HM Inspectorate of Prisons/PA UK prison conditions: in pictures A sign for HMP Liverpool, where drones are seized at a rate of more than one a week. The prisons watchdog flagged up the impact of the remote-controlled flying devices at HMP Liverpool. PA

There was one prison officer guarding the wing at the time – something the MoJ says is standard practice when inmates are locked in their cells overnight.

No one was injured during the incident, however four prisoners were taken to hospital as a precaution.

Mark Fairhurst, national chair of the Prison Officers’ Association, claimed the trade union had warned about similar incidents over the past year.

He tweeted: “The @POAUnion committee have been highlighting these security breaches for at least the last 12 months. They also use plastic spoons to break out.

“Nobody listened then but guess what? They are listening to us now.”

The MoJ said those involved would face prison adjudication hearings and a police investigation.

A full assessment of the whole prison, built in the 1840s, will also be carried out to prevent similar incidents from happening, it added.

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A Prison Service spokesperson said: “Our highly skilled staff successfully resolved an isolated incident at HMP Winchester on Tuesday night with no injuries to staff or prisoners.

“We are working closely with the police and will push for the strongest possible punishment for those involved – including more time behind bars.

“We are urgently taking action to improve and modernise.”