Royal Mail are celebrating the 40th anniversary of the publication of the first Discworld book, The Colour of Magic, by Sir Terry Pratchett OBE who is considered to be one of the UK's greatest fantasy writers.
The collector sheet contains all eight stamps from the main issue, with two of each of the 1st class stamps - ten stamps in total, together with ten labels featuring additional illustrations of each character.
The BLCS 5000 pair of covers each bear a Morpork Street, Wincanton handstamp - in 2002 Wincanton was twinned with Ankh-Morpork, the world's first ever town twinning with a fictional place.