England
Billericay School Studio Orchestra, Bromley Youth Music Trust, Cheshire Youth Orchestra, Colchester Youth Chamber Orchestra, Colne Valley Youth Orchestra, Coventry Youth Orchestra, Exeter Children's Orchestra, Gloucestershire Youth Orchestra, Grimsby, Cleethorpes and District Youth Orchestra, Hampshire County Youth Orchestra
National Schools Symphony Orchestra
A course for 13 - 18 year olds. Includes information about application, and events.
The National Association of Youth Orchestras
Supporting 125,000 young musicians in 1,800 youth orchestras around the UK. Includes information about activities and events.