This deal from Wowcher
£6.99 (from Eurotrade) for single quilted waterproof mattress protector, £7.99 for a double mattress protector, £8.99 for a king size mattress protector, or £9.99 for a super king size mattress protector!
Get a mattress protector for your bed. Quilted sheet with an extra deep 30cm skirt made from 100% polyester. Plus, a waterproof vinyl backing. Designed to protect against all forms of spillages. Washable at 40 degrees. Choose from four sizes: single, double, king or super king.