The defender has progressed through our Academy ranks to become an England Under-21 international, captaining the young Lions at this summer’s European Championship finals.

Clarke-Salter spent last season on loan at Vitesse in the Netherlands, where he made 28 appearances in the Eredivisie. He has previously played in the Championship for Sunderland and now returns to the English second tier with a switch to St Andrew’s. Birmingham finished 17th last season and parted company with manager Garry Monk earlier this summer.

The 21-year old’s Chelsea contract extension commits him to the club until at least 2022.