|London Olympic Factfile|
The marathon's distance was changed from 24.85 miles to 26.2 miles for the 1908 Olympics so the course would cover the ground from Windsor Castle to White City Stadium.
Swedish shooter Oscar Swahn, was the oldest ever competitor to earn an Olympic gold medal, winning the running deer shooting, single shot at the age of 60.
The 1948 London Games were the first to be shown on home television.
Photo-finishes and starting blocks were introduced to the sprint races.
London was asked to host the 1908 Games after Mount Vesuvius erupted in 1906 causing Rome which was the chosen host to pull out.
Although it was given just two year's notice the capital carried out the organisation of the Olympics with aplomb - introducing qualifying rounds and limiting the number of competitors any one country could field.
Two thousand and thirty five athletes, representing 22 countries, took part in the Games which ran from April 27 until October 31.
|Only 36 women took part in the 1908|
The distance for all future marathons was set at 26 miles and 385 yards and the 100 metre swimming pool was introduced.
London 1908 also saw powerboat racing and tug-of-war contests in the Games for the first and last time.
However, the London Olympics were marred by international politics and controversial judging.
Problems started when Finnish athletes were told to march under the Soviet Union flag, and Irish competitors who wanted to represent Ireland were ordered to compete on Great Britain's behalf.
The US also refused to dip their flag in front of the Royal Box, the common practise of the day, because: "This flag dips to no earthly King."
But the biggest controversy arose during the 400 metre race when J.C Carpenter, who had come first, was disqualified for obstructing the British competitor, Wyndham Halswelle.
|Marathon runner Dorando Pietri|
Part of the problem was that at the time Britain and the USA both had different rules governing obstruction.
The final was re-run but J.C Carpenter and the two other runners, both American, refused to take part leaving Halswelle to run round the track on his own.
Finally the winner of the marathon, Dorando Pietri of Italy, was later disqualified after he collapsed but was then revived and carried to the finish line by officials.
The second-placed American runner John Hayes was later awarded the Gold after the USA lodged a complaint.
All the controversial decisions at the 1908 games led to the creation of the International Amateur Athletic Federation which standardised track and field competition rules.
Also after the London Olympics the IOC decided to draw judges from an international pool rather then just the host country.
London had been awarded the 1944 Olympics in June 1939 but when war broke out just months later the Games were cancelled.
|1948 opening ceremony|
Once the Second World War ended London was again asked by the IOC to host this time in 1948 games.
Four thousand and ninety nine athletes, representing 59 nations, took part in the London Olympics - but defeated powers Germany and Japan were not invited.
Wembley Stadium had survived the Blitz and after it had been fitted with a temporary running track it was used as the Games' main stadia.
London was still rebuilding so athletes were housed in schools, government buildings and military barracks instead of the usual purpose built Olympic village.
Food was also being rationed so the IOC asked all the competitors to bring their meals with them - with left over food being donated to hospitals.
Fanny Blankers-Koen of the Netherlands was the star of the games clinching gold medals in the 100 and 200 metres, 80 metre hurdles and 400 metre relay.
|Olympic judges in 1948|
The London games saw the Olympics' first photo-finish between Harrison Dillard and Barney Ewell of the United States in the 100 metres final.
Both clocked in at 10.3 seconds but after the judges studied the results Dillard was awarded the gold medal.
And starting blocks were used for the first time in the sprint races.