Overview
- New TopCashback members can effectively get the £20 Festive Afternoon Tea Letterbox Gift for £4.67 after a £15 bonus and standard cashback.
- Existing M&S customers who are new to TopCashback are reported to pay an effective £4.83 for the same gift.
- To claim the offer, shoppers sign up free to TopCashback, find M&S on the site, click through and complete a qualifying purchase over £15, with cashback tracking shown within seven days.
- M&S lists free UK-wide delivery with optional gift message and free nominated-day delivery, with slots currently available from Wednesday, December 17.
- The newly launched 2025 festive box is letterbox-friendly and includes cakes, biscuits, chocolates and tea bags, though it has no reviews yet while the year-round version averages 4.8 stars from over 5,700 ratings.