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MPs have taken evidence on preparations for the London Olympic games.
The hearing on 14 December 2011 came following a report by the National Audit Office (NAO) that warned that 2012 games could overshoot its £9.3bn budget unless "rigorous action" is taken.
It said a doubling in estimated security costs meant there was a "real risk" more taxpayer funding would be needed.
The government has said an extra £271m was needed for security guards however ministers insist more than £500m remains in unallocated funds for dealing with any further contingencies.
The NAO said the Olympic Delivery Authority (ODA) remained on course to complete its work on the Olympic Park on time and on budget.
However, on current projections, the spending watchdog said almost all the £9.3bn public sector funding package was likely to be required, with little margin for any further unforeseen costs emerging in the final eight months.
Evidence will be taken from:
• Jonathan Stephens, permanent secretary at the Department for Culture, Media and Sport
• Paul Deighton, chief executive of LOCOG, the organisers of the Olympic games
• Robert Raine, director of Olympic and Paralympic security at the Home Office
• Peter Hendy, Transport for London
• Andrew Altman, chief executive of the Olympic Park Legacy Company