Northampton keep George North on sidelines while Wasps consider appeal

• Brain tests continue after three concussion injuries since autumn• Wasps’ James Haskell ‘astounded’ by red card for Nathan Hughes• Wasps to contest Nathan Hughes three-week ban, says Dai YoungNorthampton could not confirm on Wednesday when George North will return to action. The Wales wing will miss the European Champions Cup quarter-final at Clermont Auvergne on Saturday as he continues neurological tests after suffering three concussion injuries since the autumn.Jim Mallinder, the director of rugby at Northampton, said North was making good progress since he was carried off in last Friday’…