27-29 October: Philatex - the London International Stamp and Cover Show This event will be held at the Royal Horticultural Hall (Lawrence Hall), Greycoat St, London SW1. 25-26 November: Thematica All visitors to this event will receive a souvenir sheet commemorating 40 years of the stamp designs of Royal Mail's most prolific stamp designer, Jeffery Matthews. Admission is free at the exhibition, will be held at the Carisbrooke Hall, Seymour Street London W1.