For over 200 years the House of Stewart ruled over Scotland before James VI acceded to the throne of England in 1603. Yet for long periods, a succession of Regents held the real power until these often ill-fated Monarchs achieved the age of majority. This third Special issue in our Kings and Queens series looks at both the tragedies and the triumphs of this great Royal House.

Founded in 1660, The Royal Society has maintained its position at the leading edge of scientific discovery for 350 years. We are proud to mark this Anniversary with a Special issue featuring ten of the many prominent Fellows who have helped us to better understand the world and the universe through observation and experimentation.

This second issue in Royal Mail's Kings and Queens series features individual portraits of the monarchs, and a four-stamp Miniature Sheet.

Royalty and heritage... Two of our most popular themes united in one very Special Stamp issue - the first in our exciting new Kings and Queens series.

Battersea aims never to turn away a dog or cat in need of help; which is why it takes in 12,000 lost and homeless pets every year. So we are proud to mark the 150th Anniversary of Battersea Dogs & Cats Home with this special issue featuring some of the adorable creatures that this wonderful institution has rescued and rehomed.

Celebrating the vital part flora plays in our planet's biodiversity, Plants is the third in Royal Mail's Action for Species series.

This stunning set of Special Stamps celebrates the good work of conservationists in improving the plight of endangered insect species.

Some of Britain's most beautiful birds, once on the brink of extinction, have been captured on camera to create this enchanting set.

The third and final issue in the Lest We Forget series includes a Presentation Pack, First Day Cover and a Miniature Sheet Collection of all three mini sheets.

The third and final issue in our Military Uniforms series highlights the history of Royal Navy clothing and equipment.

An icon in British history, this charming selection of stamps depicts the revolution of military uniform, dating back 350 years.

This year marks the 90th anniversary of the formation of the Royal Air Force, so its chocks away as we celebrate the men and women of the RAF on six stamps and a special Prestige Stamp Book.

Our grand tour around the UK comes to an end with Celebrating Wales, the final issue in our Four Countries of the UK series.

Celebrate the untamed beauty of charming Scotland with this special stamp issue.

This St George's Day issue looks at all that's great about the green and pleasant land of England.

Celebrations all round... Our grand tour of the countries that make up the UK continues with these dramatic images on this superb set of stamps celebrating Northern Ireland and St Patrick's Day. Available Tuesday 11 March 2008.

This year's seven Christmas stamps feature characters from the nativity depicted in stained glass windows selected from churches around the UK.

See the first in the series of stamps and products celebrating the London 2012 Olympic and Paralympic Games.

These ten 1st Class stamps feature historic figures from three centuries of science, art, literature, politics and sport.

This issue pays tribute to the bravery of the Fire and Rescue Service, depicting the risks they face every day to help keep us safe.

The Industrial Revolution changed the lives and landscape of the British. This special issue pays tribute to those who had the vision, knowledge and drive to make it happen.

Iconic moments from the 200 year history of the iconic British Post Box are captured in these fascinating new stamps.

A set of six stamps and a Miniature Sheet to mark the bicentenary of the naturalist's birth and the 150th anniversary of his publication of 'On the Origin of Species'.

Reflecting the UK's rich history of folklore and legend, this collection features six wonderful creatures brought to life through the brilliant illustrations of Dave McKean.