If you spot someone playing scrabble on the floor of Maidstone swimming pool don’t be alarmed.

It will just be dive instructors Alex Heyes, 23, and Anthony Pike, 25, practising for their 24-hour stint under water.

The pair devised the madcap plan to raise money for charity Different Strokes after one of their colleagues from Blue Ocean Diving suffered a stroke.

So far they haven’t spent more than a few hours underwater but have been practising eating and drinking at the bottom of the pool in Maidstone Leisure Centre, Mote Park, where they’ll be making the attempt.

They’ve also stocked up on magnetic board games to keep them entertained, but were disappointed to find underwater MP3 players don’t work that far down.

Miss Heyes, from Staplehurst, said as far as she knows it could be a record attempt.

She said: “It just came to me, I was trying to think of something different we could do for charity so I started researching it and no one else has really done it.

“There’s probably a reason for that!”

The plan is not to have any breaks at all by having a spare tank at the bottom of the pool which can be used while their own tanks are being refilled.

Between 20 and 30 volunteers from Blue Ocean Diving, as well as family and friends, will take turns to stand by the pool side to make sure they are safe.

The attempt is not planned until the evening of Saturday, September 6, and if all goes to plan they won’t emerge until the Sunday night, looking slightly more prune-like than when they got in.

But they are already fund-raising to try to meet their £3,000 target.

The pair are confident it will be a success.

Miss Heyes said: “I don’t think there’s too much that can go wrong.

“The eating and drinking is quite successful when we’re not laughing, you just have to make sure you swallow before breathing.

“I’m really excited, we’re just going to go for it.”

To donate visit their website.