26 January 2010 (specific issue date because of change of advert text)
Security Definitive stamps with U-shaped cuts and iridescent text.
6 x 1st class gold booklet - first issue with year code MA10 and source code MSIL
Printed by Walsall Security Printers, with imprint on reverse. Non-cylinder booklets only.
Narrow (5mm) plain edge strip.
Inside front cover has postcode advert with web address:
www.royalmail.com/postcodes4free (lower case 'P')
SG catalogue number MB8a