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.

GB023.08

Country / Post Great Britain
Date of Issue 11 March 2008
Primary theme Architecture (Classical)
Subject Celebrating Northen Ireland
Width 20.0 mm
Height 24.0 mm
Denomination 1st class
Number in set 4 (show set)
Layout/Format miniature sheet of 4 of 4 designs
Perforations 14.5 by 14
Stamp issuing authority Royal Mail of Great Britain
Printer De La Rue Security Print