The Royal School of Church Music (RSCM), “is an educational charity committed to promoting the study, practise and improvement of music in Christian worship.” (RSCM website). They are the only organisation that has members spanning churches, organisations and individuals. The RSCM offers ecumenical education, training, courses and resources to its members, of which there are thousands worldwide.
For members, they produce a magazine, Church Music Quarterly along with Sunday by Sunday and The Network.
The social media links below are to the central accounts. There are many regions which have their own active accounts as well which can be easily located by search RCSM and scrolling through the options.