Following on from British Design Classics II Prestige Book it seems that the 54p Machin value from the next Prestige Booklets (Royal Society) will continue to be printed with the Garamond numerals.
No one seems to know why they have changed to this new script, I emailed Royal Mail recently for an explanation but they have not answered (as yet.)
I did receive am email from Douglas Myall confirming the above, he also points out that the letter "p" which is part of the value has not changed, it still conforms to the Matthews font. Myalls letter is reproduced below.
Just a quick note to let you know that the Garamond 54p appears on the definitive pane in the Royal Society prestige book to be issued on 25 February.
It is a mystery as all printers are supplied with the correct digital images. Also, why use Garamond numerals and Matthews letter `P'? I am endeavouring to find out.
Thanks Douglas for your note, I am sure every Machin collector will be interested in the answers to these questions.
It is also rumored that Royal Mail have now took notice of collectors (or read the complaints online) and have stated that "They will not be issuing no more than four Prestige Booklets in any given period of one year." This still remains to confirmed.