Harrison later became a licensed FIFA football agent and represented many players including Lucas Neill, Ali Al-Habsi, Eiður Guðjohnsen, Jussi Jääskeläinen, Hidetoshi Nakata and Andy Carroll.
The then-Bolton Wanderers manager took legal action against Harrison and Neill to recoup his money through the High Court in 2007, claiming some £650,000 plus interest and costs, and the pair conceded and agreed to repay it.
[6] In an interview with The Daily Mail, Harrison admitted taking advantage of the then-chairman of West Ham United, Eggert Magnússon, over the 2007 transfer of Neill to the Hammers.
[8] Harrison represented Andy Carroll since the age of 16, and successfully negotiated his first professional contract and subsequent deals at Newcastle United.
[9] However, Carroll had told him that he wanted to be represented by Kevin Nolan's agent Mark Curtis, a couple of months after signing a two-year contract with Harrison.
[11] Bromley is an associate of Curtis, and Harrison had been reported to have sued Carroll for loss of earnings (as per FA rules), which was referred to arbitration.
[12] In 2012, Harrison made a number of accusations on Twitter towards Curtis, Allardyce and Bolton Wanderers chairman and FA board member Phil Gartside.
[6] In 2010, Harrison was the public face behind the takeover of Olympic Charleroi, and was described as the general manager by the club's secretary and the president by the team coach.