Question. What is an Error?
Answer. A printing mistake.
All stamps sold Unmounted Mint (UMM). Since 1973 until 1993 collection of Queen Elizabeth ll (QE 2) United Kingdom Decimal Stamps of Great Britain have revealed all sorts of errors, flaws, phosphor shifts, colour shifts plus varieties in my collection. In our Stamps Online Shop of GB Stamps & Errors you will find both i.e. those that have been Catalogued by Stanley Gibbons & others that have been catalogued by us. These newly discovered stamps (ND) are from Vending & Counter booklets, Definitives (Machins), Commemorative sheets, Non Value Indicator (NVI) booklets and used stamps.
New stamps are added periodically to our online shop.
The online shop has stamps with variety of errors, flaws etc.