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.

IO010.11

Country / Post British Indian Ocean Territories
Date of Issue 1 August 2011
Primary theme Royalty & Monarchies
Subject Royal Wedding
Width 42.5 mm
Height 28.5 mm
Denomination 0.90 GBP
Number in set 5 (show set)
Layout/Format sheet of 20
Perforations 12.5 by 12.5
Stamp issuing authority British Indian Ocean Territory Administration
Printer The Lowe Martin Group