York Late Music Festival - Annual festival to promote music of all styles from 1900 to the present day. Includes a history, programme, and contact details. - http://www.latemusicfestival.org.uk/
The English Music Festival - Annual October festival of all-British composers in Dorchester-on-Thames, concentrating on early twentieth-century composers and neglected works. Includes programme, artist, venue and booking details. - http://www.englishmusicfestival.org.uk/
Tetbury Music Festival - Annual classical music three day festival held in early October in Tetbury Church. - http://www.tetburymusicfestival.org.uk
Glyndebourne Festival Opera - Official site with details of their May through August season including online box office. Near Lewes, East Sussex. - http://www.glyndebourne.co.uk/festival
Windsor Festival - Listings and venues for the annual September festival. - http://www.windsorfestival.com/
Chipping Norton Music Festival - Festival of classical and choral music, speech and drama with professional concerts held each year in March in Chipping Norton, Oxfordshire. Site includes information from previous years and schedule. - http://www.cnmf.org.uk/
Lake District Summer Music - An annual international festival and summer school presenting artists performing and offering master classes and coaching every August in Cumbria. Includes festival programme and school details. - http://www.ldsm.org.uk/
Music in Salisbury - An annual celebration of classical music with events throughout the year. Offers information on programme, performers, composers, and local community links. - http://www.musicinsalisbury.org/
Music in the Round - Chamber music festival series in Sheffield. Provides an event history, performance schedule, and photos. - http://www.musicintheround.co.uk/
Spitalfields Festival - Annual event held in Spitalfields, London in June and December. Provides news, reviews, and contact details. - http://www.spitalfieldsfestival.org.uk
St Ceciliatide - A nine-day festival of music and fine wine. Held each year in Stationers Hall, London. - http://www.st-ceciliatide.com
Loch Shiel Spring Festival - Week-long classical music festival in the Scottish highlands, with international and local performers, held every year at the end of May. - http://www.shielfestival.freeuk.com