Last Updated: 12/07/12 7:43pm
Troops to step in
An extra 3,500 military personnel will be deployed at the Olympics because of concerns G4S are unable to provide "the required number of guards for all the venues within the timescales available".
Defence Secretary Philip Hammond admitted the move, which means 17,000 troops will now be involved, will impose an extra burden upon individual service men and women and their families.
Home Secretary Theresa May denied that Olympics security was a shambles on Thursday, insisting there was "no question of Olympic security being compromised".
"G4S has now agreed that it would be prudent to deploy additional military support to provide greater reassurance."
Defence Secretary Philip Hammond Quotes of the week
With more than £100 million wiped off the firm's market value and MPs accusing the company of letting the country down, Mrs May insisted ministers were only told of the "absolute gap in the numbers" on Wednesday.
The Government turned to the armed forces, many of whom have recently served in Afghanistan and are facing cuts in the biggest re-structuring of the services for decades, to help keep the Olympics safe and secure for up to 10 million spectators.
Warning orders started going out to troops at the weekend, putting them on shortened notice to move.
Asked whether there would be any financial penalties for G4S on its £284 million contract, Mrs May said the firm's deal was with organisers LOCOG, but she understood that penalty clauses were included.
Hammond said bringing in extra resources was "prudent" and insisted the deployment would not affect other operations.
"As the venue security exercise has got under way, concerns have arisen about the ability of G4S to deliver the required number of guards for all the venues within the timescales available," stated Hammond.
"Ministers have been monitoring this situation and, where necessary, preparing contingency measures. G4S has now agreed that it would be prudent to deploy additional military support to provide greater reassurance."
A total of 17,000 servicemen and women will now be involved in the Olympics, including 11,800 soldiers, 2,600 sailors and marines and 2,600 airmen.
Some 11,000 of these will be involved in the security of more than 30 sporting venues and some 70 non-competition venues, including car parks and hotels, while others will carry out specialist support roles including air security, search teams, communications and logistics.
Overall, a 23,700-strong security force for the Games will include a mix of military, private security guards and at least 3,000 unpaid London 2012 volunteers.
Julie Nesbit, chair of the Constables Committee of the Police Federation of England and Wales, said: "It is outrageous that a private company who are being paid the best part of £300 million have failed to fill at least 3,500 security roles just two weeks from the start of the Olympic Games.
"This kind of sloppy approach to our national security is unacceptable and goes to show the perils of policing on the cheap and replacing fully trained police officers with privately employed contractors accountable to shareholders and profit margins."
DOB: 17/5/1956 Event: Boxing Medals: 1 gold Flag: USA
A week into the Games of the XXX Olympiad, Richard Moore brings us his half-way highs and lows
Linford Christie sprinted to 100m gold for Britain at an Olympic Games best remembered for America's basketball dream team.