 Further developments saw "Mash" opening in London in 1998 and in 1999 "Isola" in Knightsbridge.In 2002 Peyton opened the "Admiralty" restaurant in Somerset House to serve its arts community, and 2004 saw the opening of "Inn the Park", a restaurant in St James's Park.The Peyton & Byrne company was incorporated in 2005, which led to further restaurants at national establishments