01/12/2022 until 28/02/2023. Apply code:QDS4 at the basket stage. We reserve the right to withdraw the discount voucher without notice. Please Note: The offer cannot be used in conjunction with other discount vouchers, Mercia or Shire branded products, special offer items, sale items, multibuy discounts, in-store events and shipping charges. These terms are in addition to our Standard Terms and Conditions.