Prince William's surprise birthday message to Mary BerryThis video can not be playedTo play this video you need to enable JavaScript in your browser.Prince William's surprise birthday message to Mary BerryCloseWatch The One Show: Dame Mary Berry, a Celebration at 90 on BBC iPlayer from 19:00 on Monday 24 March.SectionNewsPublished24 MarchShareclose panelShare pageCopy linkAbout sharingRead description