The funeral route will start at the Palace Westminster before taken up Whitehall, past Trafalgar Square and to the church of St Clement Danes in the Strand.
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Joshua beat the older, more experienced boxer in front of 90,000 fans in Wembley Stadium.
Dry for most of the night. Rain in the southwest by dawn.
Host Paddy McGuinness tweeted a tribute to contestant Charlie Watkins whose date was featured in Saturday's episode.