Teesside Olympian Richard Kilty has said it was "heartbreaking" to be stripped of his Olympics silver medal alongside his relay team-mates.
Kilty, who is from Stockton-on-Tees, ran a remarkable third leg for the GB team in the 4x100m relay in Tokyo but narrowly lost out to Italy for the coveted gold medal.
But it later emerged that team-mate CJ Ujah tested positive for the prohibited substances ostarine and S-23 after the race, which took place on August 6, 2021.
And now, the doping violation has led to the whole team having their prized medal revoked.
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A statement issued by the Anti-Doping Division of the Court of Arbitration for Sport (CAS ADD) on Friday revealed that Ujah did not challenge the anti-doping rule violation, but argued he had "not knowingly or intentionally doped, suggesting that the source of the prohibited substances could have been the ingestion of a contaminated supplement".
The statement added: "The CAS ADD sole arbitrator issued the present decision in which she determined, to her comfortable satisfaction, that an anti-doping rule violation had been committed."
The CAS ADD statement said that World Athletics is requested to consider any further action within its jurisdiction, including a decision on whether to impose a ban on Ujah.
The 27-year-old athlete said in a statement: "I accept the decision issued by the Court of Arbitration for Sport today with sadness.
"I would like to make it clear that I unknowingly consumed a contaminated supplement and this was the reason why an anti-doping rule violation occurred at the Tokyo Olympic Games.
"I sincerely regret that this has inadvertently led to the forfeiture of the men's 4x100m relay team's Olympic silver medals at the Tokyo Olympic Games.
"I would like to apologise to my team-mates, their families and support teams for the impact which this has had on them.
"I'm sorry that this situation has cost my team-mates the medals they worked so hard and so long for, and which they richly deserved. That is something I will regret for the rest of my life.
"I would also like to apologise to both British Athletics and Team GB. British Athletics has supported the relay athletes for years and this has been difficult for everyone involved in the programme.
"Representing my country at a second Olympic Games surpassed my childhood sporting ambitions and I will forever be devastated that this situation has marred the success achieved by the men's 4x100m relay team in Tokyo.
"Now that the IOC proceedings have concluded before CAS, my focus is on the forthcoming proceedings before World Athletics and I will therefore not be making any further comment until those separate proceedings have concluded."
Kilty also spoke out on losing his medal describing it as "heartbreaking'".
Speaking to BBC Look North, Kilty said: “We’re getting stripped of something that we always dreamed of achieving.
“To finally go out there and win an Olympic medal, it’s heartbreaking to be finally stripped of it.”
The relay team also featured Zharnel Hughes and Nethaneel Mitchell-Blake.
UK Athletics said it was in communication with the athletes concerned but would not comment until the conclusion of the process set to follow involving World Athletics and the Athletics Integrity Unit.
