Times of release of Scotrail 'Advance' tickets ?

[General Zod]

Looking to book some tickets between Edinburgh / Glasgow and the Highlands from 11th Aug onwards but currently only Anytime singles are available on all the booking sites I've trawled through. Would anyone know of when Advances covering the above date will be released ?

 

[calc7]

They're currently up to 10th August (http://www.nationalrail.co.uk/times_fares/booking_horizons.html) so I'd have thought in the next few days (perhaps tomorrow as many releases seem to be on Thursdays).