Relyon Heyford Ortho 1500 Pocket King Size Mattress
The Relyon Heyford Ortho 1500 Pocket Mattress is an extra firm pocket spring mattress, handcrafted in the UK, with 1500 individual springs and a 32cm depth.
- Extra-firm support for heavier builds
- Foam-free fibres keep you cooler
- Minimises partner disturbance
£908
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Relyon Heyford Ortho 1500 Pocket Mattress
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Mattress details
Mattress
Relyon Heyford Ortho 1500 Pocket Mattress
Size
Firmness
Extra Firm
Construction
Pocket Spring
Orthopaedic
Depth (cm)
32
Layers
7
Layer Details
Damask cover
A finely woven damask fabric, which means a soft-touch surface that doesn't trap heat. It's a durable weave built for long-term use.
Soft white fibres
Two layers of soft white fibres sit just beneath the cover to improve breathability. In practice, this helps the mattress feel fresher through the night.
Cotton and polyester blend
A breathable blend of natural cotton and polyester that wicks moisture away from you. This keeps air circulating rather than building up warmth.
Rebound polyester and cotton fibres
A further layer of rebound polyester and cotton fibres adds a touch of comfort. It softens the surface slightly without compromising the firm feel.
Dense polyester layer
A dense polyester layer that reinforces the firm, orthopaedic character of the mattress. This is where much of the extra firm feel comes from.
Spring insulation pad
An insulation pad sits between the comfort layers and the springs. It protects the spring unit and adds durability over the years.
Pocket springs
1500 pocket springs, each secured in its own fabric pocket so they move independently. That means support tailored to your shape and less disturbance from a restless partner.
Layer details from mattressonline.co.uk product page, September 2026.
Key benefits
- 75cm each for two sharing: Each of you gets 75cm of width, which means you can settle into your own space rather than negotiating the middle of the bed.
- Pocket springs across a wider bed: The 1500 pocket springs move independently, and at 150cm wide there's enough distance between you for early starts and restless nights to go largely unnoticed.
- 200cm of length for taller sleepers: The UK king is 10cm longer than the UK double, which means anyone approaching six foot stops sleeping with their feet at the very edge.
- Firm support that doesn't roll you together: Extra firm surfaces hold their shape across the full width, so heavier couples won't find themselves drifting towards a dip in the middle.
- Room to shift position: Propping pillows, changing sides during pregnancy or easing in and out after an injury all get easier with 15cm more width than a UK double.
This size suits you if...
You share the bed every night and have outgrown a UK double, you or your partner is approaching six foot and needs the 200cm length, or one of you gets up hours before the other and wants the pocket springs plus wider gap working together to keep movement from travelling.
Consider another size if...
Your bedroom is smaller than our suggested 2.7m x 2.9m minimum, or you sleep alone. In a tighter room we'd recommend the UK double instead, allowing at least 2.6m x 2.8m for it.
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FAQ's
Is a UK king worth it over a double for the Relyon Heyford Ortho 1500?
For couples, usually yes. The UK king is 15cm wider than the UK double and 10cm longer, and the UK double gives 67.5cm each for two sharing, so the UK king gives 7.5cm more each. On an extra firm mattress with no cushioned give, that extra personal space is felt every night.
Does the king size Heyford Ortho 1500 reduce partner disturbance?
The 1500 pocket springs already limit movement travelling across the mattress, because each spring compresses on its own. The UK king adds physical distance on top: with 75cm each, a partner getting up at 5am is less likely to wake you than they would be on a narrower size.
What room size do I need for a UK king Relyon Heyford Ortho 1500?
We suggest at least 2.7m x 2.9m for a UK king, with 3.2m x 3.2m feeling comfortable once wardrobes and bedside tables go in. New build master bedrooms can be tighter than they look on paper, so measure with your existing furniture in mind before committing.
Is the UK king long enough for someone over six foot?
At 200cm, the UK king suits most people up to and around six foot comfortably. It's 10cm longer than the UK double, and the same length as the UK super king, so sizing up further gains width rather than length. If height is your only concern, the UK king covers it.
Should we choose the UK king or the UK super king in this mattress?
The UK super king is 30cm wider, giving 90cm each for two sharing against the UK king's 75cm, and both are the same length. It needs more space though: we suggest at least 3m x 2.9m for the UK super king. If your room takes it and you want maximum separation, size up; otherwise the UK king is the practical choice.