Tristram Hillier has stepped down as marketing director at Corney & Barrow, the City of London-based wine bar operator, to set up his own consultancy firm. Hillier had been with the company for over five years after joining from Pitcher & Piano. Earlier this year, the company, which operates 12 wet-led sites and is led by Lucy Knowles, took its first step to diversifying into a more food-led offering, with the launch of the Devonshire Terrace restaurant and bar.