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|title=Stanley Gibbons Great Britain Concise Stamp Catalogue 2011

|author=Hugh Jefferies

|isbn=978-0852598085

|website=http://www.stanleygibbons.com/stanleygibbons/view/content/sg_homepage

}}

Such are the complexity, the sheer variety and number of permutations possible of postage stamp issues in the 21st century, that any catalogue compiler is faced with an almost impossible task. Producing a genuinely concise book is largely a matter of what to include and what to leave out.