31 July 2014 - originally issued 3 January 2013 with code M12L the M14L version was first found in March.
12 x 1st class Royal Mail Red booklet , source code MTIL, year code M14L
Printed by Walsall Security Printers.
This new booklet was issued on 31 July 2014 with changed
telephone numbers on reverse 03457 740 740 and 03456 000 606
SG GB Concise catalogue - not yet allocated, may be MF7a
It now seems that this booklet has been printed on two different presses by Walsall.
Printed on original press: W14L - Red W5 - Phosphor W2 - Iridescent W1
Printed on new press:
W14L - Red W7 - Iridescent W2 - Phosphor W2 (unchanged but should be W3)
(A new iridescent cylinder W2 for the new press)
We have both W5 and W7 cylinder booklets. So far we do not know of a way to distinguish non-cylinder booklets from the old and new presses.