GB MNH MS1501 Stamp World London 90 Exhibition BPO 3rd Miniature Sheet Series 2.
British Post Office issue 3rd May 1990
Features 20p stamp issued in January 1990 to mark 150th anniversary of the Penny Black.
Item pictured is actual item you will receive.
I will post this item using Royal Mail Second Class post - stamps used for postage will include British Post Office First Miniature Sheet !