Roy Sach and Kate Knight have been singing together since 1998, and are known as Doublet. They have a wide range of musical styles, from 17th century ballads to contemporary folk and popular songs, and they arrange all their own music for guitar, flute and two voices. Doubletregularly appears with the Cameo Players for Christmas Soirees at Hylands House and themed entertainments such as celebrations of Jane Austen and Samuel Pepys.