The 10-km square dot-distribution maps, based on 30 years' recording by members of the British Bryological Society, were produced at the Biological Records Centre, ITE, Monks Wood. Each species' map is accompanied by notes on its habitat, reproductive biology and overseas distribution, and additional maps are included to illustrate various factors affecting distribution. Each volume contains an introductory chapter and concludes with a bibliography and index to species.

Mark Hill is a past-president of the BBS and co-author of Distribution of bryophytes in the British Isles: a census catalogue of their occurrence in vice-counties. Chris Preston is an active field botanist with an interest in both bryophytes and vascular plants; both work at the Centre for Ecology and Hydrology (formerly ITE), Monks Wood. Tony Smith is a professional bryologist at the University of Wales Bangor and author of The Moss Flora of Britain and Ireland and The Liverworts of Britain and Ireland.