M&S 2500 British Wool Pocket Spring Medium Mattress im Test

The M&S 2500 British Wool Pocket Spring Medium Mattress has the most customer reviews of any mattress in Marks & Spencer’s own-label range, 13 on the M&S site in October 2026, averaging 4.8 out of 5. It combines individually responding pocket springs with two deep layers of British wool and a pure cotton cover, and it is sold online in Double and King.

Construction and depth

M&S lists the depth as 29 cm on its product page. One verified buyer reported in October 2026 that the mattress delivered measured 25 cm, so if your bedding or bed frame depends on the exact depth, check with M&S before ordering. The 2,500 in the name is the spring count; M&S does not say which size it is counted in.

Wool does the comfort work in place of foam. British Wool says wool fibres can absorb up to 30% of their weight in moisture without feeling damp, and one M&S reviewer wrote that it “doesn’t make me overheat”.

Feel and who it suits

M&S rates the support medium, and we record 5 out of 10. One reviewer summed it up as “not too soft not firm”. It suits back and side sleepers of average weight, and couples, who benefit from springs that move independently. Firm-bed fans should look at the 3500 Firm, and side sleepers who want more cushioning at the shoulder at the 2500 Pillowtop.

Prices

At the time of writing (October 2026) M&S has 30% off selected mattresses, which brings the Double to £468.30. The promotion started on 15 September 2026 and has no stated end date.

Delivery and terms

Delivery is £15 to the room of your choice, with a 10-day lead time and no furniture delivery to Northern Ireland or the Orkney Islands. M&S lists no sleep trial and no guarantee period, and it takes mattresses back only under your statutory rights.