Making
Music (The National Federation of Music Societies)
Information sheets for amateur choirs and orchestras, 'how to' guides, services, and a members' area including a programme note bank
Concert diary, Find a Society, London Harmony Newsletter plus other news and events.
Searchable directories of UK choirs and choral concerts, and other choral music resources including music hire.
Another useful list of forthcoming amateur and professional concerts
A huge list of links, including societies with music for hire
Some other local choirs and orchestras:
Bromley Concert Band (warning: looks like the domain has lapsed)
... and the "home" choir of St Mark's Bromley, the parish church that hosts our rehearsals; (but beware - this site in the past has been a victim of hijacking which resulted in the downloading of unwanted material and an attempt at hijacking your home page)