I recently got 100hrs community service for similar thing. However the judge commented on "obviously some provocation" and believed it to be "non-premeditated". I had a glass in my hand and hit the person in a punching motion (shown on CCTV). I think the premeditation isthe key here from my experience! I also pleaded guilty at crown court and my charge was Section 47 ABH because of mainly the small cuts he received on top of his head! It was also my first offence!