According to the Philatelic Bulletin:
A new pack of Post and Go stamps will be issued through NCR Self-Service terminals in Post Office branches and from Royal Mail Tallents House from 7 July. The pack will contain 5 stamps with a total value of £3.78 (1L, 2L, 1LG, 2LG and A) and will have machine code C002.
According to Stamp Magazine:It seems unlikely that these will be dispensed through NCR terminals.
1. Self-adhesive stamps are to be printed with a security inscription on the entire backing paper from next year to deter forgers. This will include special stamps as well as definitives in counter sheets, booklets, business sheets and coils.
Given the quality of the most recent 1st class red forgery this may only be a minor inconvenience to the forgers. Very few special stamps have been forged (some Christmas stamps seem to have been targeted), so it remains to be seen how the move will affect them.
2. Horizon labels are to be redesigned with the head of Queen Elizabeth reduced in size and positioned at the top right, so as to leave space for the overprinted service and payment details. They will no longer be gold in colour. No date has been set for the introduction
We understand that the colour of the label will remain aproximately the same but that there will be no gold printing. As the gold printing currently repeats the 'ROYALMAIL' text across the labels, it is possible that this will be in white on what will be pale brown labels.