In short: first time is no excuse In full: Has all already been said - no marshalling or information at the start, most of the music spots were essentially pathetic, signage on the course was below par (missed most mile markers), my garamin also said 13.25, no water at the end - had to walk maybe 300m to get water . . . .
first time is no excuse for a race in such a setting - closing down a significant part of se London.
on the positive side - a good course and good organisation on the course.