[The] “programme revealed, in every phrase, Sullivan’s impassioned and deeply considered approach to music, in every way worthy of attention and devotion. Sullivan’s playing was engrossing, fully engaging the listener in his concentrated and complex interpretations that sought the very essence of this music’s characteristic expressive lyricism and structured intellectual rigour.

“The palpable integrity of Sullivan’s interpretative approach gave validity to the extremes of playing – headlong, virtuoso energy on the one hand, and, on the other, a refreshing, often eloquent elasticity of tempo in the music’s many lyrical stanzas.

“In the youthful sonic excess of [Brahms’] first sonata, Sullivan’s digital athleticism made a lot of noisy sparks fly with a spontaneity that is all too often lacking from live performance today.”