The Duchess of Cornwall has been meeting representatives of the Trust in Memoriam 2014 campaign at the Royal Artillery Memorial on Hyde Park Corner.
She is highlighting work done by the trust to reduce war memorial theft.
Memorial theft has been on the increase over the last couple of years as scrap metal goes up in value. The trust is trying to reduce these thefts by marking memorials with SmartWater, a liquid which leaves a traceable forensic signature.
More top news
Police said they are "extremely concerned" for the welfare of a "vulnerable" mother and her two children who have gone missing in Bexley.
It is hoped the 7,400-mile journey will become a cost-efficient and time-saving way of transporting trade between China and the UK.
The Supreme Court is set to decide on whether disabled travellers are legally entitled to have priority use of wheelchair spaces on buses.