Gourmet Burger Kitchen (GBK), the fast-casual burger brand, is to revamp its UK estate over the next five years. The company, which currently operates 55 sites in the UK, launched its new design, which includes open kitchens and artisan fittings, at its Kingston site earlier this year. It has since rolled it out to its restaurants in Guildford, Lakeside, Westfield Stratford and to its original site in London’s Northcote Road. The group’s site in Bluewater is currently being refurbished and will re-open next month. The 55-strong chain, which is led by Alasdair Murdoch, the former chief executive of Pizza Hut UK, hopes to revamp 10 restaurants a year from its original estate, while all new openings will launch with under the new design. The Westfield Stratford site was recently voted in the top ten for design at the new development. George Jones, director of property & projects at GBK, told M&C Report that the revamp was about “lifting expectations for consumers” with a look and feel that was based on “comfort and casualness”. He said: “We wanted the quality of the look and feel of the restaurants to match the undoubted quality of our food offer. The revamped sites will look different but still have that ‘GBK vibe’. “We are not trying to hide anything, we are stripping back to let the customer see us warts and all and be part of the experience.” The chain was acquired by Nando’s Group last year.