Harrison Spinks Westminster 15750 King Size 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
£2,279
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Harrison Spinks Westminster 15750 Mattress
More available sizes
Mattress details
Mattress
Harrison Spinks Westminster 15750 Mattress
Size
Firmness
Medium Firm
Construction
Pocket Spring
Wool
Natural
Depth (cm)
32
Layers
4
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.
Key benefits
- 75cm each when sharing: Two people get 75cm each, which means you can turn over or stretch out without negotiating for space in the small hours.
- Movement stays local at this width: The Cortec pocket springs respond in small, localised zones, so an early riser slipping out at 5am is far less likely to wake the person still asleep.
- Extra length for taller sleepers: At 200cm, the UK king is 10cm longer than the UK double, a genuine relief if one of you is approaching or past six foot.
- Breathable fibres across a wider surface: Egyptian cotton, alpaca wool and kapok wick moisture and regulate temperature, and with more mattress each you're less exposed to a warm partner's side.
- Room for the dog, within reason: If a dog joining you at night is routine rather than exception, the extra 15cm over a UK double means their spot costs you less of yours.
This size suits you if...
You share the bed every night and have outgrown a UK double, especially if one of you gets up hours before the other and you want their exit to go unnoticed. It also makes sense if one partner is over six foot, since the 200cm length removes the dangling-feet problem, or if a pet regularly claims a corner and you'd like your 75cm back.
Consider another size if...
Your bedroom falls short of 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, allowing at least 2.6m x 2.8m for it.
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FAQ's
Is the Westminster 15750 in a UK king good for couples?
Yes, and it's arguably the size where this mattress makes most sense. Each of you gets 75cm of width, and the Cortec pocket springs with their micro spring layers absorb movement locally, so one person shifting or getting up disturbs the other far less than on a narrower mattress.
Will a UK king Westminster 15750 fit my bedroom?
The mattress itself is 150 x 200cm. For the room, we suggest at least 2.7m x 2.9m so you can walk round both sides and open drawers without shuffling sideways. Measure with wardrobes and radiators in mind; a room that looks generous empty can feel tight once furniture is in place.
Should I get the Westminster 15750 in a UK king or a UK double?
The UK king is 15cm wider and 10cm longer than the UK double. Couples who wake each other, share with a pet, or include someone approaching six foot will feel that difference every night. If your room is under 2.7m x 2.9m, the UK double is the sensible compromise, and needs at least 2.6m x 2.8m.
Is the UK king long enough for tall sleepers?
At 200cm, or 6ft 6in, it comfortably accommodates anyone around the six foot mark, and the extra 10cm over a UK double is often the upgrade taller sleepers are really buying. If you want length plus even more width, the UK super king is the same length but 30cm wider, needing at least 3m x 2.9m of room.
Where can I buy the Westminster 15750 in a UK king?
Stock and pricing change often for premium mattresses like this one, so the most reliable answer is the live comparison table on this page. The prices shown here are updated as retailers change them, which matters at this end of the market where a sale can shift the picture considerably.