Over 100 runners participating in this year's Virgin London Marathon will attempt to break a world record under the eye of official Guinness World Records Adjudicators.
And the selection of records being attempted are wackier than ever, with 38 different record categories represented at next Sunday's race; ranging from the Tallest Costume to Complete a Marathon to the Fastest Marathon Hula Hooping.
Leading the official record attempts on the day will be inspirational mother of two, Sasha Kenney from Wrexham.
The 34 year-old, above, will attempt to set a new record for the Fastest Marathon Hula Hooping (Record to beat: 6 hours).
She hopes to raise over £2k for the NSPCC and demonstrate that "you can achieve anything if you put your mind to it."
The largest cheer of the day may go to the Casserley brothers from Woodmansterne Surrey, pictured at the top of the page.
Tom (31) and Billy (27) will attempt to set a new record for the Fastest Marathon in a Two-Person Pantomime Costume (Record to beat: 5 hours).
Dressed as 'Bonzo the horse' they will attempt to negotiate the 26.2 mile course in a record breaking 5 hours.
The brothers who lost their grandfather in 2008 will raise money for 'Help the Hospices' who they say "provided amazing care to our granddad in his final days."
The record of Fastest Marathon in a Wedding Dress (Record to beat: 4hr 11min) will be contested between 43 year-old Naomi Garrick from Devon and 30 year-old Claire Pearse (above) from Cambridge.
They won't be alone; 29 year-old Richard Bazeley from Aylesbury in Buckinghamshire will don the traditional woman's dress and attempt the feat in the male category!
Elsewhere, 39 year-old David Lawrenson from Garstang, Lancashire (above) will wear a 24ft (7.3m) tall model of the Blackpool Tower in a bid to break the record for the Tallest Costume to Complete a Marathon (Record to beat: 23ft 1 in).
David, a self-employed builder, is hoping to raise over £5k for SCOPE a charity he has supported since 2005.
Other records being attempted at this year's marathon include:
- Fastest marathon carrying 20lb pack
- Fastest marathon run by a parent and child
- Fastest marathon by a linked team
- Fastest marathon wearing a gas mask
- Fastest marathon dressed as a cartoon character
- Fastest marathon dressed as a vegetable
- Fastest marathon dribbling a football
- Fastest marathon in a fireman's uniform
- Fastest marathon in a suit
- Fastest marathon running with an egg and spoon
- Fastest marathon on crutches
- Fastest marathon on stilts
The London Marathon, run annually since 1981 through the streets of London, UK, raises more money for charity than any other single sporting event in the world.
A record total of £31 million ($48.7 million) was raised in April 2002, the last year for which figures were officially calculated.
All the Guinness World Records are being attempted at the 2012 Virgin London Marathon are part of World Record London, which will see the most exciting capital in the world attempt over 20 Guinness World Records to make London a multi record-breaking city.
To celebrate this magical year for London, the World Record London campaign is highlighting unique and one-off events available to Londoners and everyone visiting the capital between now and July 2012.