Inmates have boasted of living the high-life as they chomp on McDonald’s burgers and appear to smoke a joint at one of Britain’s highest-security jails.

The lags are also seen with illicit mobiles and Sim cards while one took a picture in his cell at Category A as he watched .

An inmate in a prison cell holding up a smuggled-in McDonald's cheeseburger.
Belmarsh inmate shows off illicit burger treat
A TikTok video showing a hand holding a joint in HMP Belmarsh prison, with the text "PRISON ?, MORELIKE HOLIDAY."
Prisoner appears to be smoking a joint in this post

Their antics are revealed in pictures posted on with mocking captions such as “HMP Belmarsh — more like holiday” and “His Majesty’s is mine”.

Sources suspect the contraband food has been brought in by a corrupt officer who was probably paid hundreds of pounds to do so.

One said: “The prisoners posting this are also taking the p*** and making a joke out of how lax the security is.

“Staff and governors need to get a grip and stop stuff like this happening inside jails where people are meant to be being punished.”

A screenshot of a TikTok video showing a person watching Netflix in HMP Belmarsh.
In another, the lag took a picture in his cell at Category A HMP Belmarsh as he watched Netflix
A man pushes his bicycle past the brick exterior of HMP Belmarsh prison.
Belmarsh prison houses 750 to 800 male inmates, including terrorists and killers Credit: Getty

The images show one inmate at the South London jail holding a £2.59 McDonald’s double cheeseburger under the caption “HMP Royalty”.

An empty chicken wrap in packaging could also be seen on the lag’s table.

Another image shows an inmate watching a clip on a smuggled smart phone — with an old-fashioned brick mobile next to it.

In another video, he smokes what appears to be a joint. Another clip shows Sim cards and USB sticks.

Last night, the account which posted the images had been disabled after we alerted authorities, who had begun an .

Our source said: “It’s worrying that pictures and video like this is being posted online especially at Belmarsh, which is meant to be Britain’s most secure jail.

“It’s clear that it was awash with phones and it’s highly likely staff brought in the McDonalds food — how else would it get in there?

“If inmates are boasting about this, it makes you wonder what else is going on.”

A hand holding a package containing several mobile phones, captured from a video with social media interface elements.
‘Contraband has no place in prisons and those who break prison rules can face extra time behind bars’, say authorities, pictured TikTok account flaunting illegal contraband
The exterior sign of HMP Belmarsh, featuring the Royal coat of arms above the prison's name mounted on a brick wall.
Last night, the account which posted the images had been disabled Credit: Alamy

Belmarsh houses 750 to 800 male inmates, including terrorists and killers.

The Prison Service said: “Contraband has no place in prisons and those who break prison rules can face extra time behind bars.”