Chris - we could move things back, but getting everyone to Wolverton for 6am doesn't seem too likely, lots of them struggle to make the 7am start.
Plus - there are 54 registered walkers already, they'd have to be informed of the changes to start time and given the option to drop out or change walks. This in turn could affect the sponsorship they've already collected.
That's of course assuming the walk leaders can be there for the earlier time, otherwise there's no point even thinking about it.
These are exactly the sorts of reasons we wanted a fixed kick off time! Oh, and just because it's May doesn't mean it'll be sunny...