A VIDEO has emerged of a prisoner being filmed eating flies "in exchange for drugs". 

The clip, uploaded to TikTok, appears to have been taken on a mobile phone in a cell at Low Moss prison, Bishopbriggs. 

A group of four prisoners are in the cell at the time.

The footage, which has been viewed more than 33,000 times, shows an inmate holding a tray which is understood to contain at least 15 dead flies. 

He says: “You ready? The Low Moss fly challenge, eat the flies for some Spice. Four of them.”

Another prisoner is filmed picking up several of the dead insects before swallowing them and showing his tongue, whilst the others burst into laughter. 

One of the four men helps gather the rest of the flies from the tray onto the prisoner's hand, saying "lick it clean, man", before he empties the rest into his mouth and shows his tongue again. 

The prisoners claim the challenge was completed "in exchange for Spice" - a drug which is smoked. 

A Scottish Prison Service spokesperson said: “While we cannot discuss individuals, our staff work hard to tackle the introduction of illicit substances and prevent the harm they cause.

“We have seen the success of measures, such as the photocopying of mail, in stopping that supply into our establishments.

“However, we are not complacent and will continue to do all we can to safeguard the health and wellbeing of people in our care.”