Iju Solomon Christopher Wariso (born 11 November 1966 in Portsmouth) is a male retired English sprinter who competed primarily in the 200 and 400 metres.

[1] Born to Nigerian parents in Portsmouth where his father was stationed with the navy, Wariso's family moved to London in 1971.

[2] He represented his country at two outdoor and three indoor World Championships and is the British record holder in the indoor 4 × 400 metres relay.

He represented England in the 400 metres and won a silver medal in the 4 x 400 metres relay event, at the 1998 Commonwealth Games in Kuala Lumpur, Malaysia.

[3][4][5] He tested positive for an illegal stimulant, ephedrine, in 1994 and was banned from competing for three months, despite his claims that he took the substance unknowingly in a herbal supplement.