GoatBoy
Did you marshal then? I was down on Sunday.
Best way to learn is to keep an eye on the more experienced marshals on site and understand how they fulfil their various roles during the day.
One thing though. Avoid being shouty. Paying customers dont like being a stranger being loud at them, even if they are breaking the rules. Being quick is the main thing and to be quick you have to be aware!
One more thing. Remember the phrase 'paying customer'. It's central to the whole thing.