Prince William is in Estonia to visit British troops but also to show the UK's support for the NATO country which borders Russia.
The King's invitation to Donald Trump to come to the UK for a state visit was seen as a key part of British diplomacy to keep the US president on side. And the King and Queen are due to go to Italy soon with a focus on UK-Italian defence co-operation.
On the Sky News Daily, Niall Paterson talks to royal correspondent Rhiannon Mills in Tallinn to discuss whether at this critical time the UK is deploying the soft power of the royals to make a difference.
Producer: Natalie Ktena
Editor: Wendy Parker
