Additionally, both Patrick Bamford and Christian Atsu have returned to the club following their loan spells with Crystal Palace and Bournemouth respectively.

Swift, 20, has made 14 appearances, scoring three times for the Championship side during the current campaign, having initially joined on a one-month deal.

The midfielder made his Chelsea first-team debut in the final game of the 2013/14 season, and has recently been called up to the England Under-21 squad.

Ulises Davila has this week joined Mexican side Santos Laguna in a permanent deal.