During his career, he has worked with Sly and Robbie, Tony Allen, Brigitte Fontaine, Areski Belkacem, Brian Eno, Grace Jones, Barry Reynolds, Atticus Ross, Tim Simenon, Robert Logan, Dave Okumu, Wally Badarou, Jessie Ware, Skye Edwards, Beyoncé and Lana Del Rey.
He has also worked on tracks with French artists such as Jacques Higelin, M, Christophe, Bertrand Cantat, Arno, Alain Souchon, Philippe Katerine, and Emmanuelle Seigner with Brigitte Fontaine.
His film credits as composer include the Oscar-winning documentary Taxi to the Dark Side (Dir.
In November 2014, he produced and co-wrote the Grace Jones track "Original Beast", featured on the Lorde curated soundtrack album for The Hunger Games: Mockingjay – Part 1 movie.
In 2024 Guest produced the new John Grant album "The Art of the Lie"[4] Lord Wimborne married Ieva Imsa in 2011.