Sheffield City Opera
- Includes past and future productions, membership, photos, patrons and links.
- http://www.sheffieldcityopera.co.uk/

English National Opera
- Britain's only full-time repertory opera company, based near Covent Garden. Includes a diary of what's on and booking information.
- http://www.eno.org

Medway Opera
- Stages grand opera, operetta and concerts in North Kent. Lists current productions, contact information, history and a guestbook.
- http://www.medwayopera.org.uk/

Bel Canto Opera
- Future and previous performances, including photo galleries and reviews. Located in Gloucestershire.
- http://www.belcanto-opera.com/

Grange Park Opera
- An opera company based at Grange Park in Winchester, an early 19th century Greek revival house. Outlines current season schedule, an archive and a brief history of Grange Park.
- http://www.grangeparkopera.co.uk/

White Horse Opera
- Stages opera sung in English. Includes its schedule, history of the company and its operas, photo gallery, opera quotations and trivia. Devizes, Wiltshire.
- http://www.whitehorseopera.org.uk/

Knowle Operatic Society
- Amateur group originally performing in Knowle Village Hall: includes online ticket reservations, calendar, company's history.
- http://www.kosweb.co.uk/

Milborne Port Opera
- An amateur group performing every Easter in Milborne Port Village Hall. Includes details of past and future events. Somerset.
- http://www.themoose.co.uk/Opera/

Midland Music Makers
- Stages grand opera in English, in Birmingham. Includes concert and venue list.
- http://www.midlandmusicmakers.org/

Opera Holland Park
- Official website of London summer opera festival.
- http://www.operahollandpark.com

Opera Interludes
- Operatic entertainment for private, corporate or charity events. Performances range from an intimate programme linked to a dinner or reception to full opera production.
- http://opera-interludes.co.uk

Opera South East
- Opera sung in English, plus concerts. Site provides schedule, photo gallery, opera quizzes and quotes. Questions and quotes can be added by viewers of sites.
- http://www.operasoutheast.org.uk

Opera Omnibus
- Presents grand opera, in English, in the Haslemere area.
- http://www.operaomnibus.co.uk

Guildford Opera Company
- Details of productions, fundraising, membership, plus members-only section.
- http://www.guildfordopera.com

English Touring Opera
- Includes tour schedules, company history and mailing list.
- http://www.englishtouringopera.org.uk/

Naked Opera
- Professional music group dedicated to the production of chamber operas.
- http://www.nakedopera.com

Mid Wales Opera
- Details about the festivals and tours.
- http://www.midwalesopera.co.uk

Pavilion Opera
- Touring chamber opera performs popular operas fully costumed with piano accompaniment. Based in Lincolnshire.
- http://www.pavilionopera.com

Opera Brava
- Professional opera company specialising in touring opera, corporate events, and education work. News, productions, performance schedule, workshops, and mailing list.
- http://www.operabrava.co.uk/

Glyndebourne
- Private Sussex opera house.
- http://www.glyndebourne.co.uk/

Opera della Luna
- (UK) A chamber opera company producing a wide variety of works in English.
- http://www.operadellaluna.org/

Scottish National Opera
- (Glasgow) Schedule and history.
- http://www.scottishopera.org.uk/

Opera at Bearwood
- (Wokingham, Berkshire) Information and schedule.
- http://www.operaatbearwood.org.uk/

Kentish Opera
- Provides an opportunity for young professional singers to gain experience in performing major operatic roles.
- http://www.kentishopera.fsnet.co.uk/

Welsh National Opera
- Information about forthcoming operas in Wales and the UK.
- http://www.wno.org.uk