Mayor of London Sadiq Khan said on Friday that his office was working on getting the Olympics back to the city and making them the "greenest Games ever".
London last hosted the Summer Olympics in 2012 and the earliest bid would be for 2036 - since the next three Games have already been allocated to Paris (2024), Los Angeles (2028) and Brisbane (2032).
"The great thing about London is you don't expend carbon on building new stadiums, new places to do cycling, new places to do swimming because we've got all the kit," Khan told Sky News.
"There's no pressure from the IOC, the key thing is to make sure we've got all the building blocks in place."
Khan said that the plans remain at an early stage and would require the support of the Government and the British Olympic Association.
London also hosted the summer edition of the Games in 1908 and 1948.
(Reuters)
Freddie Mercury in the Made in Heaven music videoSimon Fowler © Mercury Songs Ltd 
Mercury Wing Catsuit and bolero ensemble (1975)Amit Roy
Designer Wendy de Smet with the spine suit or the Black Queen suit from 1975 Amit Roy
Made in Heaven music video costume (1985) David Parry/V&A 
Japanese jacket (early 1970s)Amit Roy
Japanese jacket (early 1970s) and kimono (1950-70) David Parry/ V&A 
Ensemble worn for Imperial College gig in 1973Amit Roy
Flash ensemble and half mic (Flash Gordon 1980)Amit Roy
Freddie Mercury performs wearing a 'Flash' t-shirt at Sports Arena in San Diego, California, United States, on 5th July 1980David TanShinko Music/Getty Images
Cloal and crown ensembleAmit Roy
Cloak and crown ensemble (1986)Amit Roy
Cloak and crown ensemble (1986)Amit Roy
Freddie Mercury, Magic Tour (1986) Denis O’Regan
