Few will need reminding of how just how much Newcastle United have struggled on the injury front this season. While having so few players to rely on across a number of different competitions may not be the only cause of Newcastle’s relative failings this season, it is difficult to ignore. Still, things appear to be turning. Clearly, Alexander Isak’s injury against Aston Villa is hardly ideal but it seems other members of the cavalry are returning. Indeed, Harvey Barnes is reportedly in line to play against Luton on Saturday and he could soon be joined by others. Newcastle injury news: Joe Will…