In 1985, Hogarth and guitarist Colin Woore left the band to form How We Live, The duo were signed to Columbia Records.

However, a meeting with his publishers arranged by a friend, Darryl Way, a founding member of Curved Air, persuaded him to send a tape to Marillion, who were recruiting for a new lead vocalist following the departure of Fish in late 1988.

[6] In the end he accepted the position with Marillion, won over as the band wanted an equal partner and were offering a potentially permanent arrangement.

Since then, Marillion have recorded a further fourteen studio, and numerous live albums, with Hogarth on vocals, the most recent being An Hour Before It's Dark released in March 2022.

This album had contributions from ex-Japan/ Porcupine Tree synthesiser/keyboard maestro Richard Barbieri, former XTC guitarist Dave Gregory, Blondie drummer Clem Burke, bassist Chucho Merchan and percussionist Luís Jardim.

Subsequently, Hogarth's side-project, The H-Band, has played live across the UK and Europe featuring a variety of musicians, including former the Stone Roses MKII guitarist Aziz Ibrahim, Massive Attack and the Bays drummer Andy Gangadeen, session musician Jingles on bass, Aziz's regular musical partner Dalbir Singh Rattan on tablas and Stephanie Sobey-Jones on cello.

These shows were mixed and released for download, one at a time and for a limited period only, on Hogarth's (now defunct) H-Tunes website.

Hogarth collaborated with Swedish chamber-rock band Isildurs Bane on an album titled Colours Not Found in Nature, released in 2017.

[11][12] Hogarth is violently allergic to cats, first learning this when hospitalised as a child after visiting a Liverpudlian aunt "...whose house was full of 'em!"

[14][15] In an interview for HuffPost in 2012, Hogarth cited the Blue Nile, Paddy McAloon, Mike Scott, John Lennon, David Bowie and Joni Mitchell as musical inspirations, and Peter Gabriel, Sting and Massive Attack as artists he would like to work with.