The 32-year-old, who broke the record in 2015 when he covered 52.9km, was hoping to take the record back from Belgian Victor Campenaerts who rode 55.08km last year in Mexico.

No new date has been set for Dowsett's attempt.

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"I am really disappointed the attempt can't go ahead as planned but my health is first and foremost the priority," Dowsett said in a statement.

"I very much look forward to attacking the record in 2021 with the same intent." (Reporting by Martyn Herman Editing by Toby Davis)

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