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.

GB001.12

Country / Post Great Britain
Date of Issue 5 January 2012
Primary theme Olympic Games (Paralympics)
Olympic Games (Summer Olympics)
Subject The Olympic and Paralympic Games London 2012
Width 20.0 mm
Height 24.0 mm
Denomination 1st class
Number in set 4 (show set)
Layout/Format self adhesive sheet of 50
Perforations 15 by 15
Stamp issuing authority Royal Mail of Great Britain
Printer De La Rue Security Print