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How can SmartWater protect our war memorials?

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.