Workers in hard hats and high-vis jackets were snapped abseiling up and down Old Trafford less than 24 hours after water was seen cascading from the roof.
Manchester United insist they were there to carry out pre-planned maintenance of a section of the stadium, which was battered by a thunderous downpour shortly after full-time following the 1-0 defeat by Arsenal.
During the closing stages of the game, a fierce thunderstorm swamped the 114-year-old stadium, where water could be seen pouring from one corners of the ground.
Videos on social media showed a flood pouring under seats and even where the players’ tunnel meets the dressing-rooms.