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.
Making Music: News and Blog
Find out what's going on in your area, sign up for the newsletter, etc.
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
British Choirs on the net
A huge list of links, including societies with music for hire
Some other local choirs and orchestras:
Bromley Philharmonic Choir
South London Singers
Bromley Concert Band
Bromley Symphony Orchestra
... and the "home" choir of St Mark's Bromley, the parish church that hosts our rehearsals.