http://freespace.virgin.net/ian.smit...BR/CBR08SA.htm
seems to provide most of the answers, I hadn't even heard of this event
but
am thinking of tagging along now. Thanks for the heads up!
OK, on further inspection, it provides neither of the answers you are
looking for - but given that the feeder buses arrive in St Albans around
10am, that would seem to suggest that that is a good time to start.
Best Wishes,
LEWIS