The Duke and Duchess of Cambridge paid tribute to Australia's frontline workers in a video message released on 2 June 2020 to mark the nation's Inaugural Thank a First Responder Day. https://www.facebook.com/FortemAustralia/videos/2928256333906280/ Video: Kensington Palace The Duke and Duchess recorded their video message at Anmer Hall in Norfolk, where they have been in home isolation…