The website of The Royal School of Church Music is here:

The RSCM supports a world-wide network of 8,500 churches, schools and individuals. We are committed to achieving the best use of good music in worship - whatever the resources, whatever the styles. Through education, training, publications, advice and encouragement, we aim to support church music today and to invest in church music for the future.

Here is a link to the current publications of the RSCM.