Frankie Dettori fears he may never repair the damage done to his reputation by a failed drugs test which has seen him handed a six-month ban.
The jockey told the Daily Star: "I'm ashamed and embarrassed. It was one night of madness with friends.
"I dropped my guard when I was at my weakest. I was in a dark place. I was very low, my job was going down the drain.
"When I woke up the next morning I regretted it but it was already too late. I will regret it for the rest of my life."
He added: "People will always remember it. Now when they look at me they won't think of the things I have done for racing in the past 20 years, they'll just think, 'He's the guy who got caught with drugs'."
More top news
'Patronised' by WADA, former Paralympian and the voice of British athletes Vicki Aggar says she will keep pushing for change.
Most of today's rain will clear northwards, leaving a damp night across the UK. Mist and hill fog will also develop in places.
Despite the car’s condition, officers said it was ‘not involved in an accident today’.