Having made a small donation I receive occasional snail mail updates from the team. Latest, yesterday, was invitation to participate (subject to further donation) in a raffle for viewing places at the first flight. Made clear that it will not be a "public" event for safety etc reasons, though media will be invited. No public announcement until she's been up and landed.
Raffle to be drawn at Bruntingthorpe on 10 July with winners contacted by 'phone.
So one assumes no flight before late next week, but probably soon thereafter?