Sean Campbell (David Ajala) 2007

First Regular Appearance: 10.15 (#402) Deadline Day  Sunday 4th February 2007

Last Regular Appearance: 10.32 (#419) The Final Whistle Part Two  Sunday 3rd June 2007

Duration: EP: 402 - 419  |  SE: 10.15 – 10.32

Squad Number/Position: (#4) Midfielder

Last Seen: In the squad against Chelsea for Harchester’s epic 21-year title bid.

Sean grew up in Deptford, his mother Michelle a teenager when she had him. They came from a poor background, but his mother gave him the best life she could and he had a happy upbringing. His future in football began when he signed for his local Under 11's team, and it was clear from these early years that Sean had the potential to reach a professional career.

In his late teens he was signed with Southend United's youth team, and after a short while it was evident that he would be moving up to the first team. The January 2007 transfer window saw 22-year-old Sean sent on-loan to his first Premier League side, Harchester United. Jimmy Craig had been impressed and believed Sean could be a vital addition to the club's final push for its first Title win in 21 years, with a disillusioned Danny Sullivan heading to Southend in his place.

Not impressed with his immediate sense of humour, the boys test Sean to see if he will take the 'new boy initiation' they dish out, only to be shocked that Sean got in first with their clothing paying the price! Sean particularly enjoys clashing with Liam, and continues to rub the club captain up the wrong way, giving him the nickname "Haggis"! Always with his eye on a girl, Sean encounters the newly-awoken Gemma, and after a couple of drinks end up in bed together. Liam, who is in love with Gemma, storms in and drags Gemma out, accusing Sean of taking advantage. Soon, and for the sake of the team, Sean and Liam realise they have to make it count where it matters - on the pitch.

Sean forms a bond with Miguel Lopez and Gavin Moody, and being a force to be reckoned with on the pitch liked to celebrate in style off of it. Miguel introduces the boys to Freddericks casino and the world of spread betting, which they become addicted to following a run of good luck. When that luck changes, the three end up owing thousands of pounds they don't have. Also at this time, Michelle arrives in Harchester to collect £150,000 Sean had promised in order for her to set up her own salon. When Sean can't give her all the money, and after finding Miguel's hidden sports bag with thousands of pounds, Michelle believes Sean is gambling with Miguel. She leaves disappointed with her son, having struggled to make ends meet when he was a child and seeing how he now treats money.

Sean is present when J.F chokes on his gum and dies, and when the whole team turn on Jason for supposedly being Dragonslayer, he confesses he was on his own with J.F when he died, and the boys are forced to come clean about the whole thing. Sean makes team selection for Harchester's title bid against Chelsea, and contributes the vital first goal.

In May 2020 David appeared at the cast reunion fundraiser Harchester Reunited