Huw Warren was the co-leader and founder of the jazz quartet Perfect Houseplants with Mark Lockheart, Dudley Phillips, and Martin France.

As the trio Quercus (with June Tabor and Iain Ballamy) Warren recorded albums for ECM and produced with Manfred Eicher.

[1] He has collaborated with Mark Feldman, Maria Pia De Vito, Peter Herbert, Joanna MacGregor, Theo Bleckmann, Pamela Thorby, and Erik Truffaz.

Warren has also worked with Billy Bragg, Elvis Costello, Eddi Reader, Echobelly, Christine Collister, and the Audio Bullys.

Warren appeared in the BBC4 Sessions with June Tabor, and later with Jools Holland in the S4C Documentary (Sioe Celf) about the making of Duw y Wyr with Lleuwen Steffan.