By taking a paint brush to a war memorial in Hyde Park, the Duchess of Cornwall lent her support to a new campaign called 'In Memoriam 2014'.
It aims to protect the nation's war memorials by marking them with 'SmartWater' - a traceable liquid that should deter metal thieves.
Project Manager Jon Teare explains more in the clip below.
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London City Airport estimates the scheme will create 1,600 jobs for staff, together with 500 construction jobs.
Essex Police has become one of only four forces to use polygraph testing to help manage the risk posed by convicted sex offenders.
Two members of the public were injured along with two police officers who were in the unmarked vehicle.