From 17 February 2009 1st and 2nd class Machin Definitives (and some higher values) were be produced as self-adhesive Stamps with enhanced security features including semi-circular slits and an irridescent overprint.

The retail booklets of 4 stamps were reissued on 22 March 2011 without the printer's name on the reverse.This is the 1st and 2nd class Large Letter NVI stamps printed by Walsall Security Print in booklets on Royal Mail FDC. There were no special postmarks for the booklet, so these are cancelled with the Born Free Foundation, Horsham, postmark which was in use for the WWF 50th Anniversary issue.

The year code MA11 is now just above the letters 'ge', the source code on these booklets of 4 is still MFIL and has been moved to the lower right 'paperclip'.