The Head of the River Race is rowed on the River Thames from Mortlake to Putney in March each year.
I think this was either the schools version or a rehearsal; the Head of the River Race is actually on Saturday March 15 at 0915 hours.
In any case, there was a good turnout for this session.
(I am not sure I will turn up for the real race because Event Photography doesn’t really interest me).
More information about the Head of the River Race can be found on WikiPedia: http://en.wikipedia.org/wiki/Head_of_the_River_Race