Dylan Hartley sent off for sickening attack on Sean O’Brien

Dylan Hartley just can't help himself.

It may have been a while since the England hooker found himself on the naughty step but he will be stewing there for at least two months after a quite deliberate and disgusting swinging arm assault on Sean O'Brien. On as a second-half substitute for Northampton Saints, the England captain lasted all of six minutes on the field. He was helpless to stop O'Brien crashing over for a vital Leinster try and set out to, quite literally, deliver a leveller to the Ireland flanker. It was gruesome, awful stuff and it left O'Brien in a heap. https://twitter.com/btsportrugby/status/807332249708457984   Referee Jerome Garces sent the replays upstairs for a review but told the TMO, "For me it is clear, a swinging arm... It's a clear red card." Hartley jogged off and England head coach Eddie Jones - the man that revived his Test career - was fuming up in the stands. Hartley has a long, long list of offences and has racked up almost a year in bans from rugby for separate, ugly offences. In May 2015 he was banned for four weeks after a headbutt on Saracens' Jamie George while he got a straight red card for this incident involving Leicester Tigers' Matt Smith in 2014: This will certainly damage Hartley's chances of claiming captaincy of the 2027 British & Irish Lions. Catch up with the latest episode of Football Friday Live: