Double Olympic gold medallist and Chiswick resident James Cracknell will be among more than 2,000 glamourous guests dining underwater this weekend.

On Saturday, health club members from the Hogarth Health Club in Airedale Avenue, Chiswick, will sit down to the largest formal underwater dinner party on earth while raising money for charities.

The Hogarth Group's Park Club in Acton will host the dinner in its 25m outdoor swimming pool.

Assistance with the technical aspects of dining and breathing underwater will be provided by the International Space School and more than 40 dive masters from the London School of Diving in Chiswick High Road.

The Hogarth Club's website gives a description of how diners will consume their three-course meals, which will be served all day from 9am to 6pm.

The diners wish to match past extreme dining world records such as that set by the Social Climbers in 1989. Eight people, including Chris Darwin, great-great-grandson of Charles Darwin, sat down to a three-course banquet on the summit of Mt Huascarán, Peru (22,604ft), to set the world record for the highest formal dinner party on earth, while raising £10,000 for the National Heart Foundation.

There is still time for residents to join the 2,500 diners already signed up. A £100 donation will provide you with a full dinner, a dinner suit or ball gown plus the possibility of becoming a world record holder.

Visit underwaterdinner. to find out how you can participate.

Diners will also be given a certificate of insanity at the end of their submerged meal.