You do not have access to any existing collections. You may create a new collection.
Abstract
The British Library Philatelic Collections are the National Philatelic Collections of the United Kingdom. These collections, estimated to be over eight million items, include postage and revenue stamps, artwork, essays, proofs, covers and entires, cinderella material, specimen issues, airmails, some postal history materials, official and private posts, etc., for almost all countries and periods.