Harrison Spinks Westminster 15750 Mattress
The Harrison Spinks Westminster 15750 is a natural-fill pocket sprung mattress with a listed 15,750 springs, which means support that responds to small shifts in position rather than pushing back in one broad zone.
- Keeps warm sleepers cool & dry
- Minimises partner disturbance
- Traceable British wool fillings
£1,499
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The Harrison Spinks Westminster 15750 sits at 32cm deep and is rated Medium Firm, a feel that suits most sleepers, although lightweight side sleepers may find it slightly firmer than they'd like. Fillings include Egyptian cotton, alpaca wool, kapok and hemp, all breathable fibres that help with temperature regulation. It's a serious spend, but the spring count and natural materials go some way to justifying it.
Mattress specifications
Firmness
Medium Firm
Type
Pocket Spring
Depth (cm)
32
Number of Layers
4
Trial Period (nights)
Warranty (years)
10
Price Range
£1,499 to £2,849
Best Sleeping Position(s)
Back Sleeping
Stomach Sleeping
Combination Sleeping
Certifications
BS 7177, British Wool
Assessed from the specification published by MattressNextDay, captured September 2026, and from regular price comparison across our UK retail partners.
Why should you choose this mattress?
This mattress makes most sense if you sleep warm or share a bed. The natural fibre layers, cotton, flax, wools and kapok, are chosen for moisture wicking and airflow, so heat is less likely to build up overnight. The Cortec pocket spring system with micro spring layers gives localised support, which means less motion transfer when a partner moves. Harrison Spinks is an NBF-approved manufacturer and the wool is certified traceable British wool, reassuring if provenance matters to you. If you want a springy, breathable, traditionally made mattress, it's a strong candidate.
Key features & layer details
Top comfort layer
An Egyptian cotton and flax blend that wicks away excess moisture, which means you're less likely to wake up feeling clammy. Both are naturally breathable fibres.
Mid comfort layer
Egyptian cotton, kapok and alpaca wool work together to regulate temperature. In practice that means a cooler feel in summer and a cosier one in winter.
Viscose wool layer
A viscose wool blend derived from the wood pulp of eucalyptus, beech and pine trees. It helps regulate temperature and promotes airflow through the mattress.
Spring system
At the centre sits a layer of Cortec pocket springs with four layers of micro springs and micro ultra springs. Layered springs like these respond to your body in finer detail than a single spring unit, so support feels more tailored.
Layer details from mattressnextday.co.uk product page, September 2026.
Best suited for?
Warm sleepers
Egyptian cotton, flax and kapok layers are chosen for moisture wicking and airflow, which means heat is less likely to build up overnight.
Couples
The Cortec pocket spring system with micro spring layers gives localised support, which means less motion transfer when your partner moves.
Eco-conscious buyers
Natural fillings such as cotton, alpaca wool, kapok and hemp, plus certified traceable British wool, make this reassuring if provenance matters to you.
Back sleepers
A Medium Firm feel with layered micro springs responds to your body in fine detail, so support feels tailored and springy rather than sinking.
Combination sleepers
The responsive sprung feel throughout, rather than slow memory foam, makes changing position during the night easy without feeling stuck in the mattress.
If you prefer the slow, sinking feel of memory foam, look elsewhere: this is a responsive, sprung feel throughout. Lightweight side sleepers may find Medium Firm a little too firm on the shoulder and hip. And if your budget sits well under the starting price, this simply won't be a comfortable spend.
Save on an earlier or ex-display model
Some retailers still sell the earlier version of this mattress, or ex-display and returned stock at a lower price. These are the sizes where it costs less than the current model's best price.
Harrison Spinks Westminster 15750 Mattress
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FAQ's
How firm is the harrison spinks westminster 15750?
It's listed as Medium Firm. That tends to suit back sleepers and most combination sleepers, while lighter side sleepers may find it slightly too firm for comfortable pressure relief at the shoulder.
How many springs does the westminster 15750 have?
The listing states 15,750 springs, made up of Cortec pocket springs plus four layers of micro springs and micro ultra springs. More, smaller springs mean the surface can respond to your body in finer detail.
Does the harrison spinks westminster 15750 come with a guarantee?
The MattressNextDay listing states a Harrison Spinks 10 year guarantee. It's sensible to confirm the exact terms with whichever retailer you buy from before ordering.
What sizes does the westminster 15750 come in?
It's available in UK Small Single, Long Small Single, Single, Small Double, Double, King and Super King, plus EU Single, Double and King.
Is the westminster 15750 good for hot sleepers?
It's a reasonable choice. The fillings, including Egyptian cotton, flax, kapok, alpaca wool and a viscose wool blend, are breathable and moisture wicking, and there's no heat-retaining foam in the listed layers.
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