BBC Sport https://www.bbc.co.uk/sport/football/64384646 https://ichef.bbci.co.uk/live-experience/cps/240/cpsprodpb/3BF5/production/_128394351_bbc-sport-index-imagery-3-split-images-gradient-28fc904e-d6f1-4d05-bb38-00711b466d26.png The January transfer window has produced several surprises - and there is still time for Premier League clubs to do some business.