Cranie made his Premier League debut for Southampton aged 17

Charlton have signed Portsmouth defender Martin Cranie on loan until the end of 2008.

Cranie, 21, can play right-back or centre-half and is in the England under-21 squad to face Portugal under-21's at Wembley on Friday.

Charlton also finalised a short-term loan deal for Cranie's fellow Pompey defender Linvoy Primus next week.

The Cranie deal was completed just 20 minutes before the end of the August transfer window.