After returning in January 2008, he was close to joining another League One side, Southend United, for £200,000.Charlton striker joins Southend, BBC Sport However, the move was cancelled after he was discovered to have an irregular heart rhythm after he failed a medical.Walker move called off , Charlton Athletic F.C. The following month he was signed on loan by Southend,Southend sign Charlton's Walker, BBC Sport and scored on his debut against AFC Bournemouth.
