What to expect at under £300#

Under £300 for a UK double is genuinely budget territory. You'll be choosing between entry-level all-foam mattresses from mid-market brands (on sale), and mid-range pocket-sprung mattresses from high-street brands. Don't expect hybrids with high spring counts or natural fillings — those start meaningfully above this price point.

What you can reasonably expect: a comfortable mattress that will last 5–7 years if maintained properly, with adequate support for most average-weight sleepers.

Best all-foam under £300: Emma Original (on sale)#

Emma regularly runs promotions that bring the Original under £350 for a double, and during major sales events (Black Friday, January) it can dip below £300. At this price it's hard to beat for build quality and trial period (200 nights). If you can catch it on sale, this is the recommendation at this price point.

Best pocket-sprung under £300: Silentnight Miracoil#

The Silentnight Miracoil is one of the UK's best-known mattresses, available from major retailers for around £200–£280 for a double. The Miracoil spring system is an open-coil design with a distinctive z-wire that provides better motion isolation than a standard coil — not pocket springs, but a meaningful improvement over entry-level designs. Best for spare rooms, student accommodation and first homes where budget is the overriding constraint.

Best for a single bed under £300: Nectar Original Single#

A Nectar Original in single size (90 × 190 cm) typically comes in under £250 during promotions, making it excellent value for a children's room or single bedroom. The 365-night trial policy applies regardless of size, which is reassuring.

What to avoid under £300#

  • Supermarket "hybrids": Mattresses advertised as hybrid at under £200 almost universally use open-coil (not pocket) springs and very thin comfort foam. They compress within 2–3 years.
  • Very thin mattresses (under 20 cm): Depth generally correlates with durability and comfort layers. Under 20 cm, you're likely losing meaningful comfort material.
  • No-trial purchases: At this price, a mattress that doesn't suit you wastes the entire budget. Only buy from brands offering at least a 60-night trial.

Should you spend more?#

If your budget can stretch to £350–£500, quality improves meaningfully. An extra £100–£200 buys significantly better materials, longer trial periods and better longevity. Over a 7–10 year period, the cost-per-night difference between a £250 and a £450 mattress is around 5–6 pence — less than most people's daily coffee spend. If back support or sleep quality is a significant issue for you, the additional investment is worth it.