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.

GB090.11

Country / Post Great Britain
Date of Issue 27 July 2011
Primary theme Olympic Games (Summer Olympics)
Subject Olympic and Paralympics - London 2012
Width 35.0 mm
Height 35.0 mm
Denomination 1st class
Number in set 10 (show set)
Layout/Format sheet of 25 and 50
Perforations 14.5 by 14.5
Stamp issuing authority Royal Mail of Great Britain
Printer Cartor Security Print, France