Tas, the London-based Mediterranean restaurant group, will open its 11th site later this summer in London’s Farringdon. The group, which is led by chief executive Onder Sahan, will open a site under its eponymous brand at 5 New Street Square off Fetter Lane. The group currently operates 10 outlets under the Tas and Ev brands based in south-east and east London, including Southwark, Borough and Farringdon, plus the Hazec Restaurant Bar & Deli in Canary Wharf.