I believe it is Scott Jones. Although it is hard to tell in the fetching blue outfit. I did see him dashing around the 5km course on Sunday and I believe he did it in a pretty handy time considering he ran the Ultra the previous day.
Scott is joining David Williams in running 200 kms from Launceston to Hobart (so running the Ultra was just a quick training run) to raise money for Cure Cancer. You can follow their preparation and progress on David's Website (and donate to the cause) .
Good luck David and your bright blue friend Scott.