Adrian Tighe, managing director of G4S Transport and Borders (UK), said:
"We havebeen working closely with British Airways for over a decade and are delightedto be continuing our long-standing relationship as an integral part of theirsecurity arrangements.
"Thiscontract will allow us to work in partnership with BA developing improvedprocesses and enhancing levels of customer service."
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London City Airport estimates the scheme will create 1,600 jobs for staff, together with 500 construction jobs.
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Two members of the public were injured along with two police officers who were in the unmarked vehicle.