During a sit-down interview with The Guardian in Kyiv, he said: 'I know that [speaking out] annoys some people and it goes against the narrative.

'The book? It was a series of corrections to stories already out there. One point of view had been put out and it needed to be corrected.'

He added: 'I don't believe that I aired my dirty laundry in public. It was a difficult message, but I did it in the best way possible. My conscience is clear.'

'It is not about revenge, it is about accountability,' he says.

Harry also revealed the words of wisdom his wife, Meghan, gave him were to 'just stick to the truth'.