British sprinter Nigel Levine has been banned from all sport for four years after failing a drugs test.
The European 4x400m relay gold medallist was provisionally suspended in December.
UK Anti-Doping has now confirmed the 29-year-old tested positive for banned asthma drug clenbuterol following an out-of-competition test on 24 November 2017.
Clenbuterol is on the World Anti-Doping Agency's prohibited list because it is deemed a performance-enhancing drug and can induce weight loss.