Bistro Union will be a 40-cover neighbourhood British restaurant with a bar area offering a further 12 seats. The restaurant is due to open on 12 February on Abbeville Road, a short walk from Byatt's first restaurant Trinity which he opened in 2006.
Goward, who has also worked at Soho House and Prune in New York has been appointed head chef and will work alongside Leah Kirkland, the restaurant's general manager while Byatt remains behind the stove at Trinity.
Byatt said he had been impressed by Goward's work at Prune, one of his favourite restaurants. "Before meeting Karl I had never come across a British chef who had worked there. He is an incredible cook, and we share the same values in customer service and both absolutely prioritise the guest experience. Like me he lives in Clapham with his young family and I think we are lucky to have him," he said.
Goward's menu will champion classic British dishes that will change seasonally. The eight starter and eight main course options will include Beer & Onion Soup, Allotment Minestrone, Cottage Pie and Guinea Fowl Kiev and will be priced between £4-£8 (starters) and £11-£15 (mains).
Reservations will only be taken in the rear of the restaurant with the front section left for walk-ins.
Bar snacks will also be available, with 10 choices changed daily and available from 11am to 10pm and afternoon tea will be served between 3pm and 4.30pm.
The restaurant's decor is also distinctly British with a focus on the 'traditional British spirit of thrift and resourcefulness'. London Underground tiles feature behind the bar while much of the furniture is made from reclaimed materials.