G4S, the official security provider for the Games, announced that 10,500 people from the host boroughs are undergoing security screening and training, from a London-wide total of 25,000.

If most candidates pass the necessary checks, at least 40 per cent of the G4S Olympic workforce will be from one of the six boroughs - Newham, Barking and Dagenham, Tower Hamlets, Hackney, Greenwich and Waltham Forest.

Newham is top of the table, with 3,473 people currently undergoing screening and training.

Tower Hamlets comes in second with 1,630 candidates, while Redbridge, although not an Olympic borough, has the third highest number with 1,575.

Barking and Dagenham has 1,353 candidates, Greenwich 1,396, Hackney 1,296, and Waltham Forest 1,550.

Mark Hamilton, managing director of G4S London 2012, said: “It was always our intention to mobilise a large part of our workforce from the six boroughs around the Olympic Park in East London.

“I am delighted that we are on target to secure the services of thousands of local people who will help make the London 2012 Olympic and Paralympic Games safe and secure.

“I am also thrilled that so many have come forward to seek work; they have a very responsible, and I hope rewarding, part to play in the sporting extravaganza and they are helping to add to the buzz of excitement that is building around London 2012.”

Most of the jobs at the Games are temporary, but G4S says thousands of people will have gained Security Industry Authority (SIA) qualifications and licences.

Mr Hamiltan said: “The fact that we have so many new employees isn’t just good news for the Games, it is good news for London and Britain, particularly when you consider the issue of youth unemployment.

“The scale of our operation is so big that it will have a massive positive impact on jobs. The people who we are recruiting are gaining precious work experience but also significant volumes of training that will stand them in good stead for a permanent job once the Olympics is over, either inside G4S or in the wider jobs market.

“This will be a practical, enduring and broad legacy of the London Games.”

G4S said more than 105,000 people have applied for positions at the various Olympic venues, with more than 3,800 already deployed either working on the Olympic Park itself in Stratford, or across the country in other venues.

As the official security provider for the Games G4S will provide 10,400 security staff for the Games, and train and manage the bulk of the 23,700 strong security workforce.

A former secondary school in Newham has been converted by G4S into a training and recruitment centre, with up to 1,500 recruits passing through its doors every week.