“Olivia Newton-John, who has died aged 73, began her career as the sweetheart of country-flavoured pop.

“It all changed when she donned black spandex for Grease, one of the most successful film musicals of all time.

“Her new raunchy image found its peak in her 1981 album, Physical.

“But a diagnosis of breast cancer saw her move to an introspective style and she devoted more time to humanitarian causes.

“Olivia Newton-John was born in Cambridge on 26 September 1948. Her Welsh father had been an MI5 agent during World War II attached to the Enigma project at Bletchley Park.”

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