British Thematic Association

'For stamp collectors, philatelists and postcard collectors who like to collect "thematically", that is following a chosen theme (e.g. ships, birds, medicinal plants) or relating a story (e.g. the development of the bicycle or the history of flight) ... Our aim is to give support to those wishing to embark on or expand a theme-based collection, whether it consists purely of stamps or postcards, or includes a wide range of additional material including postal history, postmarks and ephemera.'