Something for everyone with the 1914 First World War prestige booklet out today. The content is naturally sombre and factual, with an effective fold old illustration across a set of pages. As well as three new Machins, there are the four nation's 1st Class stamps in what I am presuming will be a distinguishable form.
The Machins are maybe not very 'new' as each of the 10p tan, 20p green and £1 pale brown (or wood brown as they call it) with the code M14L MPIL, printed by Enschedé could be found in the Buckingham Palace book. I am wondering if they do have any differences at all!
The Regionals are definitely new, though, as recent issues have been different designs so you'll need that pane anyway. I am not sure whether Cartor are any different to Enschedé now.