Tuft & Springs Radiance 1000 Gel Hybrid King Size Mattress
The Tuft & Springs Radiance 1000 Gel Hybrid is a medium-feel hybrid that pairs 1000 pocket springs with Cooling Gel Fusion™ memory foam, which means you get contouring comfort without the heat build-up traditional memory foam is known for.
- Memory foam hug without the heat
- Reduces roll-together for couples
- Suits most back & side sleepers
£649
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Tuft & Springs Radiance 1000 Gel Hybrid Mattress
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Mattress details
Mattress
Tuft & Springs Radiance 1000 Gel Hybrid Mattress
Size
Firmness
Medium
Construction
Foam
Pocket Spring
Hybrid
Memory Foam
Gel
Depth (cm)
29
Layers
3
Layer Details
Sleep Surface
A soft knitted cover gives a breathable, inviting finish. It's the first thing you'll feel, and it helps air move through the top of the mattress.
Comfort Layer
Cooling Gel Fusion™ memory foam gently contours to your body, which means pressure relief at the shoulders and hips. The gel-infused design draws heat away from the sleep surface to help regulate your temperature through the night.
Support System
1000 individually responsive pocket springs move independently to support your body. That independence helps eliminate roll-together, so you're less likely to drift into the middle of the bed.
Layer details from mattressnextday.co.uk product page, September 2026.
Key benefits
- More room each: At 75cm each for two people sharing, the UK king gives you 7.5cm more personal space than a UK double, enough to stop elbows meeting in the night.
- Calmer early starts: If one of you gets up hours before the other, the independently moving springs mean climbing out of the UK king disturbs the person still asleep a little less.
- Length for taller partners: The UK king is 10cm longer than a UK double, which means a partner of around 6ft has more room to stretch out fully.
- Cooler with two sleepers: Two bodies make more heat, and the gel-infused memory foam draws warmth away from the surface, so a shared UK king is less likely to feel stuffy by morning.
- A realistic fit for most rooms: The UK king suits bedrooms that cannot take a UK super king, which needs at least 3m x 2.9m by our guidance.
This size suits you if...
You share the bed every night and keep ending up in each other's space on a UK double, one of you is tall enough that length matters as much as width, or you want a medium hybrid that softens the movement from a partner's restless nights.
Consider another size if...
Your bedroom is smaller than our suggested minimum of 2.7m x 2.9m, which is easy to miss in a new build once wardrobes go in. We'd recommend the UK double instead, which needs at least 2.6m x 2.8m.
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FAQ's
Is the Radiance 1000 in a UK king big enough for two people?
For most couples, yes. The UK king gives 75cm each for two people sharing, which is 7.5cm more each than the UK double. If you both sprawl, or a dog joins you most nights, the UK super king offers 90cm each, although that means 15cm less each on the UK king by comparison.
Will I feel my partner move on a Radiance 1000 UK king?
Less than on a smaller bed. The UK king is 15cm wider than a UK double, so there is more distance between you, and the 1000 pocket springs move independently rather than as one unit. You may still notice a heavy partner getting in, but everyday turning should travel slightly less.
Is the Radiance 1000 UK king long enough for tall sleepers?
At 200cm, the UK king is 10cm longer than the UK double and the same length as the UK super king. That makes it a sensible choice if one of you is around 6ft and your feet currently reach the end of a UK double. You gain the length without needing the extra width of a super king.
Should I get the Radiance 1000 in a UK king or a UK super king?
Choose the UK king if your room is at least 2.7m x 2.9m but short of the 3m x 2.9m we suggest for the UK super king. Both are the same length. The UK super king is 30cm wider, so it only makes sense if you have the floor space and want noticeably more room each.
What are the Radiance 1000 king size dimensions in feet?
The UK king measures 5ft x 6ft 6in, or 150 x 200cm. We suggest allowing at least 2.7m x 2.9m of floor space, with 3.2m x 3.2m giving comfortable room to walk round both sides. Compare the retailers listed on this page, as the prices shown here are updated as retailers change them.