[2] His music teachers included Elizabeth Altman, Christopher Elton, Patrick Hemmerlé and Rita Wagner for piano and Catherine Manson for violin.
[5][3] Julian Trevelyan has studied in masterclasses by Stephen Kovacevich and Menahem Pressler, Paul Badura-Skoda and Jean-Marc Luisada at the Musikverein in 2019, Maria João Pires, in 2017, Peter Feuchtwanger, 2015 and Margaret Fingerhut, 2014.
[8] He has performed piano concertos by Brahms, Howard Blake, Bartók,[9] Lutosławski, Prokofiev, Shostakovich, Tchaikovsky and Mozart.
[11] In May 2015, he took second place and the Mocsari Prize (given by Károly Mocsári) in the Ile de France International Piano Competition in Maisons-Laffitte.
[17] In 2017, Trevelyan participated in the Arthur Rubinstein International Piano Master Competition, in which he reached Stage II, the highest placing for a British pianist.
[22] Over three rounds and the final, he played Debussy, a Chopin study and sonata, a Bach partita, Brahms and Frank Martin, and piano concertos by Mozart and Bartók.