Thanks for the gen; I must be getting dimwitted, because I couldn't find any reference to the start time on your website, so thanks for the information.
Incidentally, I sent off an Enquiry Form, but didn't receive any reply or confirmation of receipt.
YoWindow is predicting a wet morning, but a dry afternoon. Let's hope that second part proves correct!
558 flew twice yesterday, so hopefully we'll see an appearance on Saturday!