I see Andy's posted the latest about the online services so certainly hang fire for the timebeing - but what I can say is that there's never oversubscription overall so don't delay making your plans.
If you are thinking of volunteering for a particular point, however, do bear in mind that the popular corners can be oversubscribed. If you've got your own transport whilst you're over there, all the better, then you can go anywhere - which I recommend to see different parts of the circuit. They are all completely different!
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