The 55-year-old man collapsed on the lower slopes of Leith Hill and died at the scene.

A 55-year-old man taking part in Sunday’s Prudential RideLondon 100 sportive collapsed and died during the event, organisers have confirmed.

The participant collapsed on the lower part of Leith Hill, the highest hill in Surrey, yesterday morning. Despite receiving what organisers have described as “immediate medical attention and an air ambulance attended”, he was pronounced dead at the scene.

Participants were stopped on the climb for nearly an hour following the incident, before a diversion was put in place shortly after.

A statement from the London & Surrey Cycling Partnership organisational team, a joint venture between London Marathon Limited and SweetSpot, continued: “Our immediate concern is for the family of the deceased and no further details will be released at this time. We would like to express our sincere condolences to his family and friends.”

This is the second fatality in as many years in the event: 36-year-old Kris Cook suffered a cardiac arrest at Newlands Corner in the 2014 edition.

Donations to his JustGiving fundraising page subsequently reached £50,000, 10,000 per cent about his original target.