Sadiq Khan snubbed an offer from the Duke and Duchess of Sussex to visit their California home during a visit to the US to avoid being drawn into their row with the Palace.
Prince Harry and Meghan Markle extended an invite to the London Mayor as he was a 90 minute drive away from their £11million mansion near Santa Barbara, reports the Evening Standard.
Instead he sent his apologies, blaming his busy schedule as he was due at a party organised by the City Hall in West Hollywood.