Machin 2011 Large Letter booklets - they're making us work for this!

ON 22 March two new booklets will be issued, the Large Letter booklets with no printer's imprint.  As expected these carry the 2011 security code of MA11, and the source code of MFIL.  The source code is in the lower right slit area, the year code above the 'ge' of Large, as before.  Thanks Richard P for the images - we'll have these for sale on the date of issue.