28 July 2016 First day cover of 1st class red from retail booklet of 6x1st, MSIL M16L
Single stamp on Royal Mail first day cover with Windsor permanent postmark 28 JUL '16
Printed by Walsall Security Printers, source code MSIL, year code M16L.
The SG catalogue number should be U2968d (also used for earlier years).
Royal Mail have introduced a new branding with this booklet including the slogan
THE FUTURE, IN SAFE HANDS
alongside a new design featuring a padlock - indicating security of the mail.
Orders for this and associated products will not be despatched until after 28 July.