UK Imperial Open Coil Mattress
King — 150 x 200 cm
Includes VAT and delivery
Tracked one-person parcel delivery on rolled sizes.
An open-coil sprung mattress, 24 cm deep, quilted in cotton and finished firm at 7 out of 10.
The Bonnell unit is one continuous coil network rather than individually pocketed springs, so it moves as a single surface. That makes it firmer and less isolating than a pocket mattress, and considerably cheaper to make. Four centimetres of comfort foam sit above the unit under a quilted cotton cover.
Rolled and boxed for delivery.
What's inside
3 layers, 24 cm
- Quilted cotton cover 2 cm
- Comfort foam 4 cm
- Bonnell open-coil unit 18 cm
24 cm total
Specification
The numbers
| Depth | 24 cm |
|---|---|
| Firmness | 7 / 10 |
| Fire safety | BS 7177 Low Hazard |
| Guarantee | 5 years |
| Trial | 100 nights |
Best for
Guest rooms, teenagers and anyone who wants a traditional sprung feel without a hybrid price.
Questions
Asked and answered
How firm is it?
7 out of 10 on our scale — firm. The scale is not an industry standard, so compare it against the other mattresses in this range rather than against another brand's number.
This sits in the middle of the range, which suits side and back sleepers, and most couples who disagree.
What is inside it?
Quilted cotton cover 2cm | Comfort foam 4cm | Bonnell open-coil unit 18cm — 24 cm in total.
How deep is it, and will it fit my bed?
24 cm, give or take a centimetre. Measure from your slats to the top of the side rail: a mattress much deeper than the surround loses the edge support the frame was giving it.
What sizes does it come in?
Small single, Single, Small double, Double, King, Super king, Emperor.
If none of those fit, we cut this build to any size in our own factory — see made to measure.
Can I use it on a slatted base?
Yes, provided the slats are no more than 7 cm apart. Wider gaps let the mattress settle into them over time, and that is excluded from the guarantee. On a solid platform, stand the mattress on its side for an hour a few times a year so the underside can dry out.
Does it need turning?
No — it is a no-turn build. Rotate it head to foot every three months for the first year, then twice a year after that.
What if I do not get on with it?
You have 100 nights. Give it at least three weeks first: any new mattress feels wrong at the start because your body has adapted to the old one. If it is still wrong, we collect it free of charge.
The guarantee runs 5 years.
Is it UK fire-safety compliant?
Yes. BS 7177 Low Hazard, under the Furniture and Furnishings (Fire) (Safety) Regulations 1988, with a permanent Schedule 7 label sewn into the border.
How long does the new-foam smell last?
24 to 72 hours with a window open. It is the foam off-gassing and it is harmless. It is strongest on a rolled mattress in the first hour after unwrapping.
How is it delivered?
Free, tracked, one-person parcel delivery on rolled sizes. Deeper and hand-tufted builds ship flat on a two-person service and we book a slot with you.
Can you take my old mattress away?
Yes — add old mattress removal to the order and the driver collects it on delivery. It goes to a licensed recycler, not to landfill.
Reviews
What people who sleep on it say
No reviews for this mattress yet. Every review here comes from someone who bought it — we would rather show none than borrow them from another product.
Compare
How UK Imperial Open Coil Mattress compares
The mattresses people put side by side with this one. Same factory, same fire certification, different job.
| Specification | UK Imperial Open Coil Mattress Currently viewing | Premium XXL Mattress for Heavier Builds | Hard Pocket Sprung Mattress | Maramureș Pocket Mattress |
|---|---|---|---|---|
| Type | Hybrid | Hybrid | Pocket sprung | Pocket sprung |
| Depth | 24 cm | 25 cm | 26 cm | 30 cm |
| Firmness | 7 / 10 | 9 / 10 | 8 / 10 | 7 / 10 |
| Spring count (double) | — | — | 800 | 1000 |
| Comfort layer | Comfort foam 4cm | High-density support foam 5cm | Support foam 4cm | Comfort foam 5cm |
| Guarantee | 5 years | 8 years | 8 years | 8 years |
| Trial | 100 nights | 100 nights | 100 nights | 100 nights |
| Price | From £199.00 | From £269.00 | From £369.00 | From £439.00 |
| View | Currently viewing | View | View | View |
Complete the order
Bought with this mattress
Recently viewed