Miranda Ostler completed her Masters in Vocal Performance with Distinction at Trinity Laban Conservatoire of Music and Dance in June 2024. She studied under Sophie Grimmer and Robert Bottriell, and was the Kathleen Roberts Vocal Scholar. Miranda also won the 2022 Paul Simm Opera Prize for the most promising student in opera. Roles for Trinity Laban Opera include Fenena in Verdi Nabucco (scenes, April 2024); Female Chorus in Britten The Rape of Lucretia (scenes, April 2023); the lead role (Barbara Strozzi) in Strozzi!, Jennifer Hamilton’s jukebox opera of works by Barbara Strozzi at Blackheath Halls (July 2022); and created the role of Kael in Edward Jessen’s new operatic sonic theatre work, Syllable (January 2022). Other recent operatic appearances include chorus quartet in the premiere of Robin Fielder's steampunk opera Serenoid, a role in the premiere production of Luciana Perc’s Film Performance at the Tête-à-Tête Opera Festival; Third Shepherd in Blow Venus & Adonis with Blackheath Halls Opera, Chérubin in scenes from Massenet Chérubin and Comtesse in Milhaud La mère coupable, and Cherubino in Puzzle Piece Opera’s online production of Mozart The Marriage of Figaro.

Her concert soloist work includes the annual Handel Messiah at Smith Square Hall with Platinum Consort and Scott Inglis-Kidger; Bach Weihnachts-Oratorium for the German Choir of London and Barbara Höfling; and Bach St John Passion for the Oxford Bach Soloists and Tom Hammond-Davies. She has also curated a series of recitals based around Libby Larsen's song cycle, Love after 1950, performing with pianists Jack Wood and Roxanna Shini in various venues across London.

Miranda is a member of The Ruffians, an upper voice vocal trio with a taste for the improvised, experimental and absurd. She was the soloist on Julian Marshall’s dance-film Yearning, and provides backing vocals as part of The Rupa Ensemble on his The Angel in the Forest disc with James Gilchrist and cellists from the Philharmonia Orchestra; she sings and speaks in multiple languages on Rebecca Galian Castello’s album The Undernetting, and has enjoyed varied session work (including with the Eric Whitacre Singers and the London Contemporary Orchestra) at Abbey Road, Air and Strongroom Studios, London. She has recorded several recent discs with the London Choral Sinfonia and Michael Waldron; and deputises with the BBC Singers and Tenebrae.