Not too much by way of explanation for these, but some more links you might find useful...
Abingdon Summer School for Solo Singers - Superb! Does what it says on the tin.
Art Song Central - A great free sheet music resource for Art Song singers.
FreyaBeya - A small UK charity providing music and music therapy in special needs schools.
Hear the Choirs Sing! - Online showcase which is also good for finding songs etc.
International Music Scores Library Project (IMSLP) - Free online scores and music library.
Internet Cello Society - Great online resource for cellists!
Making Music (National Site) - Championing and supporting voluntary music in UK.
Making Music (South West Area) - Information from Making Music UK South West region.
Musicnotes.com - A really useful sheet music download site.
Opera Talent - A great resource for opera fans and followers.
Paul Turner (Accompanist) - Paul Turner's website.
Swindon Music Festival - Homepage for Swindon's Annual Music festival.
Swindon Recital Series - Swindon's professional recital series.
Teresa Gale Costumes - Superb professional costumes by Bristol costumier Theresa Gale.
Theatreworks - Excellent regional UK arts site with events diary and other resources.
Virginia Tech Multi-Media Music Dictionary - Another useful online resource.
Vocal Scores - Source of cheap online vocal scores.
Vocalist (UK) - Resources and listings for vocalists and teachers.
Don't forget to check out the main links page here.