Former Rangers striker Gordon Dalziel feels Celtic can learn a thing or two from their Scottish Premiership title rivals with a new goalkeeper required at Parkhead following Joe Hart’s retirement. By Allan McGregor’s own admission, Rangers handled the succession plan for a legendary shot-stopper pretty well indeed. InJack Butland, Ibrox is home to the finest shot-stopper in the division these days, the England international snapped up on a free transfer from Crystal Palace and producing a host of virtuoso displays for a Gers side now top of the table and with a Europa League last-16 clash to l…