In an aggressive downwind leg, Greneveld passes Macgregor on the left then takes a penalty likely for not jibing to the mark, proper course and winds up rounding outside of Macgregor.
Leroy is now leading on the run over Tulloch but almost overlapped.
The course is being changed and the fog is beginning to make visibility difficult.
Spithill split at the start after ducking Souter. Souter now leads by less than a length on the right.