20 October 2016 - 12 x 2nd class blue booklet with source code MTIL
Cylinder numbers: W6 (blue), W1 (iridescent) W3 (phosphor) - the numbers are hidden by the front cover of the booklet.
A new printing was made on in 2018 (packing date not known) on SBP2 with year code M18L
Small number of Cylinder booklets available.
Printed by Walsall Security Printers.
SG GB Concise catalogue - new number expected to be ME7a