Witnesses include Lord Coe, Chairman of the Organising Committee and officials from the Olympic Delivery Authority.
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The Olympic Delivery Authority says the increase is necessary to cover extra staffing and security at the site.
I'm told that it will be paid for by the Olympic Delivery Authority.
The NAO also raised its concern that the Olympic Delivery Authority's transport plan for the Games was behind schedule.
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Wednesday she referred further inquiry to the publicly funded Olympic Delivery Authority, which developed Olympic infrastructure, including the bicycle parks.
Ralph Luck, of the Olympic Delivery Authority, will join gold medalist Paul Goodison at the unveiling of the sailing academy later.
The Olympic Delivery Authority (ODA) said the venue will give British cyclists and aspiring Olympians and Paralympians a place to practice.
London 2012 leaders have faced criticism after former Olympic Delivery Authority chairman Jack Lemley complained of growing costs and political meddling.
The Olympic Delivery Authority, coordinating construction for the 2012 Games, said the fire was located within the Olympic site, behind a bus depot.
Last week the Olympic Delivery Authority (ODA) said work to transform Weymouth and Portland's sailing facilities for 2012 was "racing towards the finishing line".
The Great British Garden Competition has been organised by the Olympic Delivery Authority with the Royal Horticultural Society (RHS), which runs the annual Chelsea Flower Show.
Labour ex-minister Baroness Morgan of Huyton, a board member of the Olympic Delivery Authority, said the 2012 project had been "a coalition project before coalitions became so fashionable".
The Olympic Delivery Authority said of the 44, 000 people that worked on the Olympic Park, a fifth came from the five host boroughs and as well as 450 apprentices.
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John Armitt, chairman of the Olympic Delivery Authority, explained how "having a clear focus" and a bit of pressure was the secret to bringing in "the biggest regeneration in a single place since World War II" on time and within the budget.
It is too early to tell whether the Chinese aviation authority's warning of cutbacks, delivery deferrals and even cancellations will seriously hurt Europe's flagship plane-maker Airbus.
"Although disappointed with this congressional action, the board will follow the law and...delay implementation of its new delivery schedule until legislation is passed that provides the Postal Service with the authority, " the board said in a statement.
Draft delivery targets for mail have been set for Jersey and Guernsey Post by the Channel Islands Competition Regulatory Authority (CICRA).
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They include reducing mail delivery by the U.S. Post Office to five days a week, giving the Treasury Department the authority to rethink the way pennies and nickels are coined to save costs and new restraints on military veteran benefits.
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