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OK - there's some bullshit going on somewhere. I'm guessing that Sigler got his GMT and BST mixed up. If the counter on the left here is correct, then the book will be available at 5pm *BST* (British Summer Time, ie British Daylight Savings) and *not* 5pm GMT as it states elsewhere.
mrben "Carpe Aptenodytes" http://www.jedimoose.org