You will need to scroll down the page quite a ways to find the pattern. https://www.stylecraft-yarns.co.uk/Content/Downloads/Free...

Janie Crow designed this beautiful crocheted cushion cover using the Special DK Limited Edition colour pack of 10x50g balls in these gorgeous new shades:
Kelly Green, Fuchsia Purple, Cypress, Boysenberry, Empire, Duck Egg, Grass Green, Pistachio, Lobelia, Mustard.

You work both front and back of the cushion cover. The back has straight across stripes, the front is a chevron pattern.

Blocking:
The size and shape of the crochet pieces will change once they are blocked. The back of the cushion panel in particular changes shape by quite a lot. Pre Blocked, the piece looks rectangular, but blocked it pulls out to square – it is a good idea to block your pieces before embarking on the making up process.