The London Media Centre will welcome both accredited and non-accredited journalists, with workspaces to house more than 250 reporters.
There will also be press conference facilities which can seat 200 journalists and a 24-hour media centre with live broadcasting areas, office space for photographers and dining facilities.
According to a release from Johnson's press office, the National Olympic Committees collectively accredit around 25,000 journalists and other representatives from international media organisations to report on the games.
This gives them access to the Olympic Park Media Centre and International Broadcast Centre. In a statement Boris Johnson said the media centre will secure all other journalists a place of work also in central London.
"Journalists joining us for these historic days in the summer of 2012 are now guaranteed a central working base in the heart of all the action," he said. "A stone's throw from the London Media Centre lie some of the capital's most iconic shots and locations, ready to be beamed into homes across the globe."
Christopher Wyld, director of the Foreign Press Association added that he welcomed the securing of a central location for the media centre.
"The Foreign Press Association in London looks forward to working closely with the Mayor and Visit London to make sure that visiting journalists get every opportunity to see what a diverse and exciting city London is before, during and after the 2012 Games," he said in the release.
"London is one of the great media hubs of the world and the central location of the London Media Centre will provide yet another opportunity to welcome foreign journalists to the United Kingdom and help them gain access to the people they want to meet and the places they want to see".
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