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Twenty years on, many of us still remember where we were on 6 September 1997 – the day of Princess Diana’s funeral.

For the people featured in this moving documentary, who were involved in a professional capacity, the memories are particularly vivid.

Those sharing their stories include a pallbearer, the royal florist and a policeman who witnessed first-hand the outpouring of public emotion on the streets of London.

Their testimony is interspersed with archive footage, featuring moving moments such as Princes William and Harry walking behind the coffin, Earl Spencer’s tribute to his sister and Elton John’s rendition of Candle in the Wind.