Duke of Sussex knocked on doors in London to find aristocrat friends

It is a royal mystery perplexing the residents of a quiet street - just why did privacy-obsessed Prince Harry knock on a succession of front doors?

And more to the point who was he looking for? Captured on a doorbell camera last month, a suited was seen outside a stranger's house, his mobile clamped to his ear.

Only that week he was in the capital claiming in court that his life was at risk without armed UK police protection. Yet here he was knocking on doors at opposite ends of the street.

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