Derek McInnes has endured a much‑scrutinised start to life at Ibrox but the new Rangers manager got the old ground bouncing here as his side dominated Celtic in front of an all-blue crowd to decide the first Old Firm encounter of the season. Against a backdrop of bouncing techno from the tannoy, Rangers fans celebrated three memorable goals in a thumping League Cup win. A brace for the captain, Dan Neil, bookended Kevin ­Kelsy’s second‑half finish to put Martin O’Neill’s side down with relative…