The World Association for the Development of Philately (WADP) and the Universal Postal Union (UPU) jointly conceived and developed the WADP Numbering System - WNS, which was launched on 1 January 2002.

GB091.12

Country / Post Great Britain
Date of Issue 25 April 2012
Primary theme National symbols
Fine Arts (Textiles)
Subject Definitive issue - Northern Ireland
Width 20.0 mm
Height 23.5 mm
Denomination 0.87 GBP
Number in set 8 (show set)
Layout/Format sheet
Perforations 14.5 by 14.5
Stamp issuing authority Royal Mail of Great Britain
Printer Cartor Security Print, France