Harrison Spinks Derby 2500 Mattress
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.
- 75cm each for two people sharing: That's noticeably more personal space than a UK double, which means fewer elbows and less negotiating over territory in the night.
- Pocket springs across a wider bed: Each of the 2,500 springs moves independently, so when one of you gets up at 5am, the other side of a 150cm-wide bed barely registers it.
- 200cm of length for taller sleepers: The UK king is 10cm longer than the UK double, so anyone approaching six foot stops sleeping diagonally or dangling their feet.
- Natural fillings that breathe across the full width: Wool, flax and cotton keep the sleep surface cooler than foam, useful when two bodies share one bed every night.
- Medium firm support for shared use: The medium firm tension suits most back and combination sleepers, so a couple with different sleep positions can usually both settle on it.
This size suits you if...
You share the bed every night and a double has started to feel cramped, one of you keeps different hours and you want their comings and goings to disturb you less, or one of you is approaching six foot and needs the 200cm length more than the width. It also suits couples whose dog has quietly claimed a corner of the bed.
Consider another size if...
Your bedroom is smaller than the 2.7m x 2.9m we suggest for a UK king, or you sleep alone. In either case we'd recommend the UK double instead, which needs at least 2.6m x 2.8m.
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Is the Harrison Spinks Derby 2500 in a UK king big enough for a couple?
For most couples, comfortably. At 150 x 200cm you each get 75cm of width, and the 2,500 pocket springs mean movement on one side doesn't travel far across a bed this wide. If a dog or a small child regularly joins you, sizing up to the UK super king, which is 30cm wider, may suit you better.
What room size do I need for the Derby 2500 in a UK king?
We suggest a room of at least 2.7m x 2.9m for a UK king, with around 3.2m x 3.2m feeling properly comfortable. That allows walking space on both sides and room for bedside tables. In a new build master, measure carefully once wardrobes are accounted for, because these rooms are often tighter than they first appear.
How much bigger is the UK king than the UK double for this mattress?
The UK king is 15cm wider and 10cm longer than the UK double. The width is what couples notice night to night, but the length matters just as much if one of you is tall: at 200cm, the UK king gives a sleeper approaching six foot proper room to stretch out without their feet reaching the edge.
Will the UK king Derby 2500 suit someone over six foot?
The length is the main reason to choose it. At 200cm, the UK king is 10cm longer than the UK double, which is often the difference between lying straight and sleeping at an angle. The medium firm pocket spring support holds up well for taller, heavier sleepers, although lightweight side sleepers may find it slightly firm at the shoulder.
Where can I compare prices for the Derby 2500 in a UK king?
Use the retailer table on this page. The prices shown here are updated as retailers change them, so it's the most reliable way to see what the UK king currently costs rather than checking each shop separately. Stock and pricing can differ between sizes, so check the UK king specifically rather than the model's starting price.