With the January transfer window open, Goal brings you all the latest confirmed deals involving the likes of Manchester United, Arsenal and Liverpool The 2018-19 Premier League season is at the half-way point and, with the January transfer window open, there is sure to be a flurry of transfer activity as clubs attempt to strengthen their squads. Some of the richest clubs on the planet are involved in the English top tier and the rumour mill is in full flow, with…