Lancaster is a self-taught producer and learnt by practising using a small Pro Tools production rig in his own home. In 2012, Lancaster worked on his first full-length album, producing and mixing Don Broco's debut albumPriorities. The album peaked at number 25 on the UK Album Charts, marking Lancaster's first UK Top 40 album and the beginning of a longstanding relationship with the band. In 2013 he produced, co-wrote, and mixed Lower Than Atlantis' eponymous fourth album. The following year, he worked with Mike Duce from Lower Than Atlantis to co-write and produce the song "Heartache on the Big Screen" by 5 Seconds of Summer, a B-Side to their breakout single "She Looks So Perfect". In 2015, Lancaster contributed production to Don Broco's sophomore album Automatic, obtaining his first UK Top 10 album as a producer in the process when the album peaked at number six on the UK Album Charts. Significantly, this year gave Lancaster his big break when he was chosen to mix Bring Me The Horizon's fifth album That's The Spirit. The album reached number two in both the UK Album Charts and US Billboard 200 when released in September 2015, while reaching number one in Australia and Canada amongst other countries. The success of this album lead to Lancaster starting to collaborate with acts from outside the UK. He contributed mixing to Blink 182's seventh album, California, which reached number one in both the UK Albums Chart and US Billboard 200. Just a couple of months afterwards, he then worked with Japanese band One OK Rock for their single "Taking Off", where he took on co-writing and production duties. The album associated with this single, "Ambitions", reached number one on the Weekly Oricon Albums Chart, bringing with it Lancaster's third album to go number one in at least one country, and his first number one in Japan. Between 2016 and 2017, Lancaster worked with a number of artists, branching out into more mainstream music than his traditional clients in rock music. He co-wrote and produced Nina Nesbitt's "Chewing Gum" single from her Modern Love EP, then contributed production to the Good Charlotte album Youth Authority, as well as co-writing and producing three tracks for Fenech-Soler's third album Zilla : "Kaleidoscope", "Touch", and "Conversation". He also worked with Lower Than Atlantis for the second time, recording, producing and mixing their fifth album, February 2017's Safe in Sound. He has writing credits on this album for "Had Enough", "Dumb", "Long Time Coming" and "Work For It". In 2017 Lancaster built and has subsequently worked in his own customised music studio in the London Borough of Hackney. His first project in the new studio was with Don Broco for the third time, recording, co-writing, producing, and mixing their third album, Technology, released 2 February 2018. The album peaked at number five on the UK Albums Chart; their most successful to date. Other projects completed in this time include mixing the songs "American Attraction" and "Casualty" from Anti-Flag's tenth album, American Fall, Hollywood Undead's fifth album titled V, and mixing the songs "Lovesick", "Heartbroken", and "Midnight" from You Are Someone Else, the debut album by British indie-pop band Fickle Friends.
