Royal Mail Post and Go machines A012, A013 and A014 will be attending Spring Stampex at The Business Design Centre London on 15-18 February 2017.
Each machine will vend the new Mail by Rail issue along with:
A012 the Machin, with a ‘Machin Anniversary 1967-2017’ inscription.
A013 the Locomotive design from the Heritage Transport set.
A014 the Machin with a ‘65th Anniversary of The Queen’s Accession’ inscription.
13 January UPDATE by WhiteKinght on another post:
The Isle of Man postal service will launch its "Variable value" definitive stamps at Spring Stampex next month. The initial publicity shows 4 designs depicting "The Legs of Mann" and they look very much like "Post and Go" labels.
So far the publicity has not used that term so presumably the stamps will not be Royal Mail IAR labels but from another source - perhaps the same as the Irish "Stamps on a reel" (SOAR) (I'm only speculating here of course) No doubt the Isle of Man postal service will give more details in the near future.