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The spooky clip initially shows licensee Katie Ann Round setting up the A-board and mopping the back room of the boozer.

But after the 31-year-old left the room in The Chapel House in Dudley, West Mids., the yellow wet floor sign seems to float mysteriously and almost fold itself to the floor.

As Katie's fiancé Ben Parkes enters the shot, the mop in the corner of the room is propelled across a table.

(Image: FACEBOOK)

Katie said: "I was cleaning up at the night and heard something in my kitchen, I went out to look and couldn't see anything so I thought it was my other half pulling my leg.

"He jumped out of his skin. When we looked at the footage, we couldn't believe it."

Spooked Ben, 35, added: "I was cleaning the bar at the time and Katie called me so I went round the back and that's when I saw the mop move."

(Image: FACEBOOK)

The couple think the bar is haunted, having researched its history online.

Ben continued: "Last Friday a glass on a shelf above the bar propelled off and hit me hard in the chest.

"It turns out that the cellar at the pub and the arches in the cellar were barred and used as overflow cells for the nearby police station.

"Sometimes you can hear footsteps coming upstairs but then they just stop."