Individuals and organisations which look after war memorials are being encouraged to apply for free "SmartWater" kits.
A unique traceable liquid, which is painted onto the memorials, "SmartWater" is virtually impossible to remove - and can even withstand burning and sand blasting.
Today, the Duchess of Cornwall helped to protect the Royal Artillery Memorial on Hyde Park Corner, by applying the fluid with a paint brush.
More top news
Russell Davy is still haunted by the memory of Eddie Heath, the chief scout he says sexually assaulted him at Charlton.
A leaked letter has caused huge controversy.
Video taken in Soho Square shows sparks flying into the air as the men cut through a lock on the Ducati bike.