Lovely herringbone fabric, this is the Keswick reference by Designers Guild, available here in the Blossom, Eggshell and Waterleaf colourway.
 
Retails: £57.00/m
 
Measurements:
Blossom: 140cmW x 80cmL
Waterleaf: 137cmWx 95cmL
Eggshell: 140cmW x 65cmL
 
Composition: 91% Polyester 9% Viscose
 
Its official description is: "A tweed-like textured weave featuring a chevron twill pattern with multi shaded yarns. Machine washable and hard wearing for all upholstery, bedcover and accessory applications"