As reported by Boxing Scene, the 29-year-old has failed to secure his licence again having not fought since stopping fellow Briton Nicky Jenman in his home city of Sheffield in April 2018.

Cameron tested positive for benzoylecgonine, the main metabolite of cocaine, in the same month as his win over Jenman and was subsequently banned for four years by UKAD.

He vowed to fight the ruling, insisting he was not guilty, but has now been told the ban will be upheld. 

"After all the money, time [and] emotions spent on getting my licence back, I’ve been informed it's over for me as they are keeping with the four-year ban," Cameron wrote in a message posted on Twitter.

He added: "The judge says it's very harsh of UKAD to do this to me and I was offered [a reduced ban of] 15 months to begin with, but there's no chance.

"I'll go down on my shield."

Cameron leaves boxing with a record of 21 wins, including nine knockouts, and five losses.

The former Commonwealth middleweight champion and ex-International Boxing Organization youth super-middleweight champion now intends to get a gym and become a trainer.

UKAD is the organisation responsible for protecting sport in the United Kingdom from doping.