The new restaurant is part of a multimillion-pound restoration of the Grade II listed building, which dates back to the 1500s and is said to be one of the oldest hotels still operational in England.
It is reopening under new ownership on June 22, with 49 bedrooms, two restaurants and a bar and lounge.
Further refurbishment, set to be completed in August, will see the addition of a cookery school and farm shop, with a luxury spa and riverside glamping hopefully launched in 2022.
Lee Clarke ran Clarkes in the city centre from 2011, before founding Prévost in 2016. He will be overseeing all elements of food and beverage service at the hotel, including breakfast, afternoon tea and a more casual brasserie-style menu.
General manager at the Haycock Manor Hotel, Tom Wortley, said: "The Haycock has a proud history of welcoming guests for over 450 years but the guest experience we are creating now combines that wonderul history with luxury finishes and the latest smart technology.
"Our highly talented team have been tasked with making the Haycock one of the finest hotels and food destinations in the East of England and they have the skills, experience and drive to achieve it."
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