Dylan Hartley banned for six weeks leaving him available for Six Nations

• Hartley will be short of match practice before Six Nations• Northampton hooker was sent off for third time in his careerDylan Hartley will be available for England’s entire Six Nations campaign after being given a six-week ban for striking Sean O’Brien.Hartley appeared before an independent disciplinary hearing in London to be sanctioned for the third red card of his career, received in Northampton’s Champions Cup defeat by Leinster on Friday. Related: Eddie Jones under no pressure to drop Dylan Hartley, says RFU chief Dylan Hartley is banned for six weeks after being sent off for this incid…