Harrison Spinks Derby 2500 Mattress
The Harrison Spinks Derby 2500 is a medium firm pocket spring mattress with 2,500 springs and a 25cm depth, filled with natural materials including British wool, flax and sustainably sourced cotton.
- Stays cooler than foam-topped beds
- Wool gives a soft, cushioned feel
- Minimises partner disturbance
£899
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The Harrison Spinks Derby 2500 comes in UK Double, King and Super King. It carries an NBF-Approved Manufacturer certification and traceable British wool, which means you can be reasonably confident about what's actually inside it. It suits sleepers who want a traditional, natural-fill feel rather than memory foam contouring. Natural fillings settle a little over time, but that's normal for this style of mattress and regular rotation helps.
Mattress specifications
Firmness
Medium Firm
Type
Pocket Spring
Depth (cm)
25
Number of Layers
5
Trial Period (nights)
Warranty (years)
10
Price Range
£899 to £1,199
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?
The main draw here is natural fillings at a mid-range price. Wool gives a soft, cushioned surface, flax adds breathability, and cotton wicks away moisture, which means the sleep surface stays cooler than a foam-topped alternative. If you're a hot sleeper, that combination matters. Underneath, 2,500 pocket springs work independently of one another, so you get pressure relief where your body needs it and less disturbance from a restless partner. The medium firm tension suits most back and combination sleepers, although lightweight side sleepers may find it a little too firm at the shoulder. Yes, the starting price is real money, but the traceable wool and NBF-approved manufacturing give you a clearer idea of where that money goes.
Key features & layer details
Cover
A breathable Belgian damask fabric cover. Damask is a woven fabric rather than a stretchy knit, which means a slightly more traditional, supportive feel on the surface.
Wool
Wool filling gives a soft, cushioned feel and suits sleepers who prefer a traditional, natural mattress. It's also naturally temperature-regulating, so it helps in both winter and summer.
Flax
An organic, absorbent, light fibre that enhances breathability. In practice, it helps air move through the upper layers so heat doesn't build up around you.
Sustainably Sourced Cotton
Highly breathable cotton fibres provide a fresher, cooler sleep surface and wick away excess moisture. It's responsibly sourced from trusted suppliers, which fits the mattress's natural credentials.
Pocket Springs
Each spring sits in its own fabric pocket, so they move completely independently of one another. That means better pressure-relieving support and less motion transferring across the bed when a partner moves.
Layer details from mattressnextday.co.uk product page, September 2026.
Best suited for?
Warm sleepers
Flax and cotton layers help air move through the top of the mattress and wick away moisture, so heat is less likely to build up overnight.
Couples
Each of the 2,500 pocket springs sits in its own fabric pocket, which means less motion travels across the bed when your partner moves.
Back sleepers
The medium firm tension gives steady support under the spine, while the wool layer adds a soft, cushioned surface on top.
Combination sleepers
Medium firm springs with a woven damask cover give a supportive surface that feels consistent whether you are on your back or turning over.
Eco-conscious buyers
Traceable British wool, organic flax and responsibly sourced cotton make up the fillings, and the manufacturer carries NBF approval, so you can see what is inside.
If you love the sink-in, contouring hug of memory foam, this traditional pocket spring feel will seem quite different, and possibly too springy. Lightweight side sleepers may find medium firm a touch too solid for their shoulders and hips. There's also no UK Single size listed, so it won't suit single bed frames.
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 Derby 2500 Mattress
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FAQ's
How firm is the Harrison Spinks Derby 2500?
It's a medium firm mattress. That tension suits most back and combination sleepers, giving support without feeling like a board, although lighter side sleepers may find it slightly too firm for comfortable pressure relief at the shoulder.
How many springs does the Derby 2500 have?
It has 2,500 pocket springs. Each one sits in its own fabric pocket and moves independently, which means the mattress responds to your body's shape and reduces the ripple effect when someone else in the bed moves.
Does the Harrison Spinks Derby 2500 come with a guarantee?
MattressNextDay's listing states a Harrison Spinks 10 year guarantee. As this appears on a retailer's page, it's sensible to confirm the guarantee terms with whichever retailer you buy from before ordering.
Is the Derby 2500 good for hot sleepers?
It's a reasonable choice. The wool, flax and cotton fillings are all breathable natural fibres, and the cotton wicks away excess moisture, so heat is less likely to build up than with a foam-heavy mattress. No mattress can promise a cool night, but the materials here work in your favour.
What sizes does the Harrison Spinks Derby 2500 come in?
It's available in UK Double, UK King and UK Super King. There's no Single or Small Double option listed, so it won't fit smaller bed frames.
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