Prince Harry claims he was "stopped cold" after Prince William used a "secret code" they had for "times of extreme crisis" in a row on the day of Prince Philip's funeral.
An extract from his memoir Spare, which was featured during his tell-all interview with Tom Bradby on ITV this evening, goes into detail about a confrontation between the two brothers on the day they said their final goodbyes to their late grandfather.
The bust-up, which Tom describes as an "extraordinary and heartbreaking scene" in the book, sees Harry recall how William forced him to look into his eyes so he could tell him that he loved him and wanted him to be happy.