This deal from Wowcher
From £24.99 (from EC Life-Style) for a waterproof rattan corner sofa protective cover!
Get a protective cover for your rattan corner sofa! Black cover made from water resistant polyester. Features bungee drawstring and double stitched seams for a snug fit. Offers protection against sun, rain and snow. Ideal for corner/L-shaped rattan sets. Choose from four sizes (see Full Details for dimensions).