We have now had confirmation from Royal Mail Tallents House that this IS a visible change and will be included in regular orders for both Collectors and Dealers standing orders.
We now have the design. As you can see the brass padlock on the front cover has an imitation 1st class stamp on it (I imagine the similar 2nd class booklets to be issued in October will have a similar 2nd class stamp picture on), and the back cover has the Royal Mail cruciform logo and space for the bar-code, with a new slogan between them, reading
THE FUTURE, IN SAFE HANDS
The weight/dimension information and telephone numbers are now on the label on the inside. How this will translate to the books of 12 (including the 2nd class) we don't know.
(An interesting slogan, in the light of current events on the political stage.)
PS: As this stamp should be coded M16L MSIL it will be a new stamp with a specific issue date and we will produce a limited number of first day covers.
UPDATE 7 July: The stock code for this booklet is UB393 and it is being sent out to regular customers with Visible Change, with the 'Landscapes' Issue on 16/08/2016.
NB: My delivery of these booklets (14 July) had UB394 on the delivery note!
UPDATE 28 June:
No transport livery reported yet, but Suzanne of Artstamped reports this from Marylebone Underground Station - 'not just redirection, protection', and a similar one at Leamington Spa station.
UPDATE 30 June:
As you probably know, the Google-originated adverts which appear to the right of the blog will vary for different viewers, based on your passed searching and viewing habits - cookies rule! Sometimes, however they do relate to the subject of the blog and this one appeared when I looked this morning.