After leaving Portsmouth, Campbell had short stints at Notts County and Newcastle United before returning to Arsenal for a second spell. However, he could not replicate his earlier form and retired from football in 2012 at the age of 37.

Apart from his club career, Campbell also represented England at the international level. He made his debut for the Three Lions in 1996 and was a regular member of the team for over a decade. 

He played in three World Cup tournaments and was part of the team that reached the quarter-finals in 2002. He also played in two European Championships and was named in the UEFA Team of the Tournament in 2004.

Campbell's career was not without controversy, and he was involved in several high-profile incidents. In 2001, he caused outrage among Tottenham fans when he moved to Arsenal on a free transfer. 

He was also accused of racism in 2008 when he was playing for Portsmouth, although he was later cleared of the charges. Campbell was known for his outspoken views on racism in football and was an advocate for more diversity in the sport. 

After retiring from football, Campbell has been involved in various business ventures and has also worked as a pundit for television networks. He has also been linked with managerial positions at several clubs but has not yet taken up the role.

In conclusion, Sol Campbell was a talented and accomplished footballer who played for some of the biggest clubs in England and represented his country at the international level. He was a solid defender, a threat in the opposition box, and a natural leader on the pitch.