Footage has emerged online of three pranksters swimming and diving off boards in the swimming pool inside Medway Park at night while it was closed.

The trio, posted a Snapchat video on Facebook saying they had accidentally on purpose got locked into the Medway sport centre, in Gillingham.

It is not clear what night the pranksters got stuck inside the Medway Council facility in Mill Road, but at least two of them strip off to their swimming shorts and have a private late night dip with one, diving off one of the driving spring boards.

The footage which shows the pool area in almost darkness, was posted on the social networking site on Wednesday, May 24, showing what the trio got up to.

The cheeky chaps even start using the centre’s PA system to made their own announcements and to play music.

At one point one of the three can be seen wheeling himself around the pool in a wheelchair mucking around with it.

One of the pranksters can also be heard saying: “We are having too much fun.”

It is not known how the three got into the sports centre, but they have named the footage Cascades Mark 3, which echoes similar footage posted in 2014, when two pranksters got inside the Cascades Leisure Centre, in Gravesend.

At the time the pair were condemned after stripping off and plunging into the council-owned leisure centre pool after it was shut for the night.

Then Dan Jarvis and his partner-in-prank Raith O’Shea posted a video and photos on Facebook of them enjoying the impromptu swimming session.

It is believed they hid from staff before making their big splash.

The video, with the catchy title of Cascades Leisure Centre After Hours Night Edition, come complete with a soundtrack and photo montage.

Scenes included the pair having fun on the children’s slide, skinny dipping and going down the pool’s two flumes.

Video: The footage posted online earlier this week. Vid: Lee Marshall

They took snaps of each other posing in the spa and pretending to fight an ornamental crocodile.

The film ends with the couple bidding their viewers farewell as they leave via a fire exit, describing the experience as “emotional”.

Closing titles provide a link to Dan’s other “crazy videos” on his YouTube channel, where he boasts that he is “Britain’s Most Wanted”.

Dan, or “BMW Jarvo” as he has dubbed himself on his YouTube channel, is no stranger to pranks.

He has videos featuring cheeky acts including one where he is dressed up as an elderly man and tries to charm women, which garnered more than 330,000 views.

Unfortunately for Dan and Raith, Cascades bosses saw the footage and photos on Facebook and contacted the police.

A Medway Council spokeswoman said: "We have reported the incident to police and as with any incident we will review our own procedures."