Lovely herringbone fabric, this is the Keswick reference by Designers Guild, available here in the Blossom colourway.
Measures: 140cmW x 80cmL
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