Because of technical difficulties, Alan Hale's BBS Field Guide site has had to be shut down from June 2013, but the species accounts and some of the content can be accessed here.
The want of a field guide has for many years
greatly hindered further spread of interest in British and Irish field bryology. By filling this gap in the market, the guide has made a group that has largely been the realm of specialists into an accessible and popular interest for naturalists, reaching far beyond the current pool of bryologists, and into the wider community of naturalists beyond. Indeed, the guide makes an attractive, modestly priced Christmas or birthday gift for friends and relatives who are or might become interested in bryophytes. The BBS has published the guide, minimizing the price.
This book is the only up-to-date, user-friendly
guide to identifying British and Irish bryophytes in
the field, with hundreds of colour photographs and black and white drawings showing what species
look like, together with notes on how to identify
and distinguish similar species, and habitat notes
and distribution maps showing where they occur.
Unfortunately, the Field Guide is temporarily unavailable because of technical problems at the publishers, but normal service should be resumed soon.