Seen via Twitter today
"Just announced that Flying Scotsman unfortunately won't be here August as hoped. But still on display later this year" http://www.nrm.org.uk/AboutUs/PressOffice/PressReleases/2011/July/scotsmanannouncement.aspx. There are problems with the frames and the press release includes a full explanation and statement from Steve Davies. (RNF something of a different news thread to the other British news of the day).
Also see Yorkshire Post, Heritage Railway.