Princess Kate and Prince William reportedly regard Lady Louise Windsor as a 'real asset,' according to royal sources.The Princess of Wales, 42, shares a close bond with Louise's mother, Sophie, the Duchess of Edinburgh.

Kate wore her famed sapphire engagement ring during a slate of engagements for the annual Festival of Remembrance.

In March, Kate confirmed she had been diagnosed with an unknown form of cancer. What followed was a nine-month battle as she underwent “preventative chemotherapy”. She endured intense online speculation in the weeks leading up to the public announcement and has largely stayed out of the spotlight since.