London’s Metropolitan Police have determined that terrorism suspect Daniel Khalife’s escape from a London-area prison was "clearly pre-planned" as new details surface following the incident and police focus their search.

"It is clearly pre-planned, the fact that he could strap himself on to the bottom of the wagon," Met Police Chief Sir Mark Rowley told news outlet LBC, calling the incident "extremely concerning." 

He argued that such an escape was "unlikely to be something you do on the spur of the moment," and the police have made serious inquiries to determine whether the escape was an "inside job" with help from a prison guard.

"It is a question," Rowley mused. "Did anyone inside the prison help him? Other prisoners, guard staff? Was he helped by people outside the walls or was it simply all of his own creation?" 

LONDON MAYOR INSISTS CRIME FALLING DESPITE TIKTOK-DRIVEN LOOTING INCIDENT, DATA PAINTS A DIFFERENT PICTURE

Khalife, 21, was discharged from the army in May under accusations of obtaining information that might be "directly or indirectly useful to an enemy," as well as making a bomb hoax by placing three canisters with wires on a desk.

Britain Prisoner Escapes

This image, provided by the Metropolitan Police, shows Daniel Abed Khalife, aged 21, who disappeared from His Majesty’s Prison Wandsworth on Wednesday, Sept. 6, 2023, just before 8 a.m. He was in custody, awaiting trial on charges related to terrorism and alleged violations of the Official Secrets Act. (Metropolitan Police via AP)

He remained in custody while awaiting trial but appeared to have escaped from His Majesty’s Prison Wandsworth shortly before 8 a.m. Wednesday. Authorities have suggested that his position in the prison’s kitchen gave him access to a food delivery van, which he strapped himself under as it drove away.

Initial reports did not indicate to whom Khalife allegedly passed information, but the BBC revealed on Thursday that Khalife may have sought information on behalf of Iran. He would have stood trial in November for his crimes. 

NEWSPAPER BLOCKS CHATGPT FROM CONTENT AMID GROWING BACKLASH AGAINST NEW TECH

Some officials suggested Wednesday that the straps under the van indicated the possibility of inside help, but the theory is gaining confidence as more details surface. 

Daniel Khalife terrorism

A wanted sign featuring an image of Daniel Abed Khalife, a former soldier who is suspected of terrorism offenses, is displayed near Wandsworth Prison, where he escaped from in London Sept. 7, 2023. (Reuters/Anna Gordon)

LBC also reviewed a notice sent to National Health Service facilities that asked they "look out for anyone presenting with burns as the escaped prisoner is likely to have severe burns from under the exhaust of the van used to escape."

Daniel Khalife terrorist

Prison guards walk around the sides of a van at the gates of HMP Wandsworth in south London on Sept. 7, 2023, a day after terror suspect, Daniel Abed Khalife escaped from the prison while awaiting trial. British authorities have issued an all-ports alert to track down a former soldier awaiting trial on terrorism charges, after he escaped from jail by clinging to the bottom of a delivery van. (Justin Tallis/AFP via Getty Images)

A former detective told The Sun newspaper that the burns would have resulted from Khalife's contact with the exhaust system under the van during his escape.

FORMER FINNISH PM SANNA MARIN QUITS POLITICS AFTER LOSING APRIL ELECTION

Detectives also believe that Khalife is still wearing his prison-issued cook’s uniform he wore when he escaped, the BBC reported. 

Terror Suspect Escape

The stone walls of HMP Wandsworth are seen in the late summer sunshine in south London on Sept. 7, 2023, a day after terror suspect, Daniel Abed Khalife escaped from the prison while awaiting trial. British authorities have issued an all-ports alert to track down a former soldier awaiting trial on terrorism charges, after he escaped from jail by clinging to the bottom of a delivery van. (Justin Tallis/AFP via Getty Images)

The search has narrowed to Richmond Park in southwest London, with officers combing the area overnight and into the morning, though, police have scaled back their efforts. Officials said the focus on the park did not result from any specific lead or intelligence. 

The incident has prompted Chief Inspector of Prisons Charlie Taylor to say that Wandsworth "really needs closing," with a watchdog group rating the prison as a "serious concern" even before the escape. 

CLICK HERE TO GET THE FOX NEWS APP

"When you find a prison like Wandsworth, it really needs closing," Taylor told Politics Hub on Sky News. "Ultimately, it’s not a suitable prison." 

"You need jails because you need to service the courts," he added. "We’ve actually got a crisis at the moment in prisons just in terms of population places … there are only just enough prisons, places available, at the moment for the number of prisoners who are coming in."