Shoulder charge is a penalty.
Head shoulder charge is a red.
I am not too fussed by the shoulder charge, for me it's the lateness. If you have the ball and are square with the play, you will protect yourself with a shoulder charge, but a late shoulder charge is basically just the same as hitting someone in the back. That's why I thought it was a Yellow, without a judgement on the head high. Even the ref said it was late, but he could not say where on the body it was.
Well in my opinion the late shot is dirty and so a Yellow. Surely he can give a Yellow and then report for the head high????