Chelsea left-back Filipe Luis insists he does not want to leave the club despite struggling to earn a starting place.
Gerard Pique says Barcelona are prepared to lose Xavi in the summer as reports link the midfielder with a move to Qatar.
The 21-year-old stopper is yet to make a first-team appearance for the reigning European champions but has made more than 60 Football League appearances during loan spells with Barnet, Yeovil, Bristol Rovers and Northampton.
Walker's arrival at the Weston Homes Community Stadium seems to suggest manager Joe Dunne will remain in his position, for the time being at least.
Dunne admitted he was considering his future after Saturday's 2-1 home reverse at the hands of fellow strugglers Scunthorpe - a ninth successive league defeat and an unwanted new club record.
Dunne is also close to bringing in another unnamed player, believed to be former loan striker Jabo Ibehre.