Premier League returnees West Bromwich Albion have secured the permanent services of Grady Diangana from West Ham, the Hammers announced.

West Brom reportedly signed the winger for an £18-million fee, according to BBC Sport.

Diangana, 22, played a vital role in the Baggies' promotion after moving to the Hawthorns on loan, bagging eight goals across 30 league outings for Slaven Bilic's side.

West Ham said they made the decision to sell Grady "reluctantly but - ultimately - (it is) in the best interests of the club."