2. More than 500,000 runners have finished the London Marathon's 22 races, between them covering 21 million miles - roughly half the distance from Earth to Mars
3. Lloyd Scott ran the slowest ever time in the same race. Wearing a 120lb diving suit, he took five days, eight hours and 29 minutes
4. Runners have completed the course backwards, playing the clarinet, or juggling balls, but never all three at the same time.
5. Like all great ideas the marathon was thought up in a pub – the Dysart Arms in Richmond – by Chris Brasher and John Disley.
6. The first race was held on the 29th of March 1981 and 6,255 people finished the race.
7. The race holds the Guinness world record for the largest annual fund raising event in the world.
8. The race used to finish on Westminster Bridge, but because of repair work to the bridge, the finish was changed to The Mall in 1994, where it has remained ever since.
9. Organisers provided 88lb of petroleum jelly for medical use including avoidance of "runners' nipple"
10. The marathon was originally run over 26 miles, the distance covered by Phidippides to bring news of Athens's victory over the Persians at the battle of Marathon in 490 BC.
11. The London Marathon is the only one requiring athletes to run in two different hemispheres.
12. There are 29 people who have run in all 24 London marathons. One of them has flipped pancakes around the course for the last 10 years.
13. There are 76 pubs en route.
16. Record for the marathon backwards is 3:56.
18. The course record for a pantomime horse is 4:37.
19. There are 23 water break stations on the course, one at each mile point after Mile 3.
20. Every competitor receives a ChampionChip, a small electronic device that sends a signal at the start and finish line allowing personal times to be recorded.
21. Over the last 23 years, only one runner in 1,000 ends up in hospital.
22. 50 physiotherapists and 30 podiatrists are on duty.
23. Seven brothers, the Cullen family from Croydon, south London, ran dressed as the Seven Dwarfs.
24. About 7.5 acres of silver-foil space blankets are handed out to finishers.
25. The London record for a conga line to complete the course is 25 hrs and 13 mins.
26. Best represented age group is the thirtysomethings.
26.2. There were..