2015, Williams collaborated with fellow London based producer, K15, to produce an EP entitled WU15. In the following year, Williams recruited both Dayes and Cawthorne to perform at the 2016 Worldwide Awards hosted by London DJ and broadcaster Gilles Peterson. Williams and Dayes were subsequently signed to Peterson's independent label, Brownswood Recordings. The duo released their only studio album, Black Focus, under the name Yussef Kamaal in November 2016. The album was met with critical acclaim. Clash Music described the sound as "exceptional, vital" and "enthralling"; whilst Canadian magazine Exclaim! described it simply as "dope". The album was widely praised for its unique blend of sounds traditionally associated with jazz, hip hop and breakbeat music. Williams revealed that large amounts of the album were improvised in the studio, and emphasised the importance of musical dialogue between the musicians in structuring the performances. The album was engineered by Malcolm Catto of The Heliocentrics and recorded at his studio in London. Williams praised his "old school" approach to recording and crediting him with mixing two of the tracks on the album. Williams and Dayes collaborated for a brief and tumultuous period following the album's release. Shortly before embarking on a tour of the United States, the band were refused entry to the country after Dayes' visa was revoked in accordance with an executive immigration order implemented by the Trump Administration. Several weeks later, the duo announced their split. On his split with Dayes, Williams commented: "Nothing has really ended; it travelled into something new and fresh now." From 2017 to 2020, Williams hosted a monthly radio show on NTS Radio as Henry Wu, playing a selection of music from his influences and associated acts in the London scene. 2018–present: The Return and Wu Hen In the years following, Williams established his own label, Black Focus Records. Less than two years after the release of Black Focus, Williams enlisted the services of former bandmate and drummer Josh 'MckNasty' McKenzie and bassist Pete Martin to produce his solo bandleader debut, The Return. The album was recorded in the South London house Williams grew up in. The album was recorded over the course of a week. Recording engineer Richard Samuels remarked that, despite having the opportunity to record in professional studios, the performance of the musicians in a familiar and comfortable environment was conducive to a "free flowing album". The Return was received as a