Well, I shot the Worcester round, and despite coming second in the first session, I shot a disappointing 296 out of 300. My form was terrible and my frame of mind was not right, so I packed up and did not bother with the second session.
Looking back I wish I had, if I had sorted my self out for the session I could have won the double round, and I don't like to give up at competitions.
After thinking about why I had issues with my form, its just down to posture and alignment and how shooting indoor can make you feel a bit cramped up, compared to shooting out doors where the style is much more natural and relaxed (due to the increase elevation of the bow).
After some practice tonight, it maybe that I need to lengthen my draw length by about 1/4". I was trying to touch the tip of my nose with the string but this meant collapsing slightly to do so. However when I shot without trying to do this, the alignment felt OK, and I was able to bring the elbow round in line and the aim steadied.