Harrison Spinks Derby 2500 Mattress
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Mattress
Harrison Spinks Derby 2500 Mattress
Size
Firmness
Medium Firm
Construction
Pocket Spring
Wool
Orthopaedic
Natural
Eco-Friendly
Depth (cm)
25
Layers
5
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.
- Room for two in most bedrooms: At 135cm wide, the UK double fits comfortably in rooms where a UK king would leave little space to move around.
- 67.5cm each when sharing: Two people sharing get 67.5cm each, and the pocket springs move independently, so a restless partner disturbs you less within that space.
- Space for bedside tables both sides: In a typical UK double room, this footprint usually leaves enough wall on each side for a bedside table, which a UK king often doesn't.
- Easy to dress: Double sheets and duvets are sold everywhere at every price, useful if you're kitting out a whole home and the budget is stretched.
- Generous for one: Sleeping solo, the full 135cm is yours, with the wool and cotton fillings keeping the whole surface cool rather than warming up where you lie.
This size suits you if...
You're a couple in a typical UK bedroom and want a shared bed that still leaves space for a wardrobe and drawers, you're furnishing a guest room that visiting couples will use, or you sleep alone and want space to spread out, perhaps with a dog or cat claiming a corner. It also suits older houses with narrow, turning stairs, where a larger mattress can be awkward to get up.
Consider another size if...
You and your partner both like space and your room measures at least 2.7m x 2.9m. In that case we'd recommend the UK king instead: it's 15cm wider and 10cm longer than the UK double.
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Is the Derby 2500 double big enough for two adults?
It works for most couples: two people sharing get 67.5cm each, and because each of the 2,500 springs sits in its own pocket, movement on one side transfers less to the other. If either of you is broad shouldered or you both sprawl, the UK king's extra 15cm of width is worth considering.
What room size do I need for the Derby 2500 in a UK double?
We suggest at least 2.6m x 2.8m, with around 3m x 3m the comfortable norm. That allows walking space around the bed and, in most layouts, bedside tables on both sides. These figures are our own guidance rather than the manufacturer's, so measure your room before ordering.
Does the Harrison Spinks Derby 2500 come in a single?
No. The UK double is the smallest size available, alongside the UK king and UK super king. If you're buying for a single bed frame, this mattress won't fit; you'd need a different model. For a solo sleeper with the room for it, the UK double gives you a generous 135cm to yourself.
Should I get the Derby 2500 in a double or a king?
The UK double suits most shared bedrooms; the UK king is 15cm wider and 10cm longer, which helps taller sleepers and couples who want more personal space, but it needs a room of at least 2.7m x 2.9m by our guidance. If a king would crowd out your wardrobe or bedside tables, stick with the UK double.
Is the Derby 2500 double good for a guest room?
Yes, it's a sensible guest room choice. The 135 x 190cm footprint fits a second bedroom without dominating it, and the medium firm tension suits a wide range of visiting sleepers, couples included. Double bedding is cheap and easy to find, which helps when you're dressing a room that's used occasionally.