6 x 1st class deep scarlet MSIL retail booklet reprinted with M18L year code on SBP1
The original booklet on SBP2 appeared in May 2018 a used copy of the stamp being reported before a source of booklets was found locally.
This printing of the Padlock booklet is on SBP1 which appeared later during the summer.
Printed by Walsall Security Printers, source code MSIL, year code M18L.
The SG catalogue number is expected to be MB18b ?
Sorry, out of stock of cylinder booklets. Single stamps are also available see 2936aS.8a