... there is the possibility of the Northern Ireland internationalist aiding the Ibrox club's push for promotion.
Only two members of the quintet - Haris Vuckic and, briefly, Remi Streete - have featured for the Glasgow club and it has emerged they are paying £5,000-a-week for their services and will be due their English counterparts a £500,000 bonus if they secure a place in the SPFL Premiership.
However, Ferguson, the 18-times capped 23-year-old who has been recovering from a knee operation, is expected to travel to Scotland in the coming days and interim manager McCall has admitted he could play for his side.