BBC bosses dubbed him "the Russell Brand of the kitchen", an epithet he himself is baffled by. He is affectionately referred to by many as “truffle head” due to his passion for truffles, as seen in episode one of his series, What to Eat Now. Warner's recipes appeared quite regularly in the "Living" section of the television and radio guide magazine, Radio Times, during the six weeks when his series What to Eat Now was being broadcast on BBC Two. In one of the final recipes which he wrote for the Radio Times "Living" section, he discusses recipes with mackerel, stating that if he could eat only one fish, it would certainly be mackerel. Valentine also writes a recipe feature every month for olive magazine.
Valentine has written two bestselling books to tie in with his BBC2 series -
Warner attended Bedales School in Hampshire from 1985 to 1990 and in 1994 studied at the Byam Shaw School of Art. Warner's father was diplomat Sir Frederick Warner who was British Ambassador to Japan from 1972 until 1975.
- What to Eat Now (2008)
- What to Eat Now More Please: Spring and Summer (2009)
- What to Eat Now: Autumn and Winter (2010)
- What to Eat Now: Spring and Summer (2010)
- The Good Table (2013)