League One - Arsenal sign defender Jenkinson
The 19-year-old moves to Arsenal after making only nine appearances for Charlton, having first joined the League One club at the age of eight.
Jenkinson was born in England but has represented Finland at youth level as he qualifies through his mother.
The right-back made four appearances during a spell on loan at Eastbourne last season and his move to Arsenal has been widely anticipated.
Meanwhile, Arsenal have confirmed that youngsters Benik Afobe, Chuks Aneke and Oguzhan Ozyakup have all signed new contracts.