Nicolas Anelka is free to resume his career in England after completing an education course following his quenelle gesture.
St Mirren have signed winger James Dayton from Oldham on loan until the end of the season.
Bolton have signed West Ham forward Robert Hall on loan until the end of the season.
The striker, 19, who can also operate as a winger, is available to Trotters boss Dougie Freedman for Saturday's trip to Charlton.
England youth international Hall spent time with Wanderers' npower Championship counterparts Birmingham earlier this season, where he played 13 games, including the full 90 minutes in a 3-1 December defeat at the Reebok Stadium.