Tom Cully, known professionally as Jamie Isaac, is an English singer, songwriter and producer.

Signed to House Anxiety /Marathon Artists, Isaac's debut EP, I Will Be Cold Soon, attracted attention for its near-choral incantations, minimalist jazz tones and post-rock layering. Isaac has been praised for using the power of silence with experimental and enveloping swaggering beats and his self-aware lyrics. His second EP, Blue Break, gained recognition for its soulful, piano-led sound. Featuring Jamie in The Guardian's New Music, Michael Cragg praised "Blue Break" for "favouring space and atmosphere over production histrionics".

In the run up to the release of his debut album Couch Baby, Isaac presented the 'Loose Grip' Mixtape, a series of remixes of tracks taken from the album featuring collaborations with Rejjie Snow, King Krule under the moniker Edgar The Beatmaker, Jesse James Solomon, Jadasea, Black Mack, and Mr Malarky.

In January 2018, Jamie released 'Doing Better' followed by 'Wings' in March. He then announced the title of his next album (04:30 Idler), which was released on 1 June 2018. His latest single '(04:30) Idler / Sleep' was released on 23 May 2018.