Two versions of the label, one with Yellow phosphor and the Boots logo and a reprint without the logo with blue phosphor
Eventually ( after a big moan from collectors ) they were made available by Royal Mail from the majority of the main Philatelic Outlets.
The original label with yellow fluor was printed by Jon Enschede of Holland ONFP/PVA with 2 bright yellow phosphor bands. A second series was introduced without the Boots logo between 1995 - 1998. These also differ in size to the originals and were printed by either Enschede or Questa on OFNP/PVA with 2 blue phosphor bands.
I will add more details of these at a later date, including ellipse types, inset bands and other factors. Be sure to return for this information.
Due to demand and a growing shortage of the Boots Labels , continuing the trend, labels without the Boots logo were also used as promotional labels. There are many to collect and as the popularity for them grows new designs are appearing on a regular basis.
A full list of these labels (including the Boots versions) will be listed shortly.