Best Mattress for Side Sleepers UK 2026: What We'd Actually Buy

If you sleep on your side, your mattress has one job: let your shoulder and hip sink in enough to keep your spine straight, without you bottoming out. Get it wrong and you'll wake at 4am with a dead arm and a grudge against your bed.

After cross-referencing the current UK reviewer consensus — Mumsnet, TechRadar, Expert Reviews, Tom's Guide, WhatMattress — and verifying live pricing on each vendor's own site, our pick is the Simba Hybrid Pro at £799 for a double. It's the mattress that shows up on more "best for side sleepers" shortlists than anything else, and the price-to-performance ratio still beats the premium tier.

Who should pick something else

• You weigh under about 60kg. TechRadar's lightweight panel testers found the Simba Hybrid Pro a bit too firm, especially for side sleeping. Go for a softer memory foam like the Nectar Premier, or the slightly softer Simba GO Hybrid, which TechRadar rates at around 6.5 out of 10 for firmness.
• You run very hot. Mumsnet's overall pick is the Harrison Spinks Canterbury 4450, made with British wool, cotton and flax for breathability.
• You're under £400 all-in. Skip the bed-in-a-box brands and look at the IKEA VÅGSTRANDA.

The shortlist at a glance

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1. Simba Hybrid Pro — best overall for side sleepers

The Simba Hybrid Pro is the mattress we kept circling back to, mostly because nobody had a serious complaint about it. Expert Reviews calls it one of the best mattresses for side sleepers, citing three layers of springs and a temperature-regulating wool layer. Mumsnet's senior content editor slept on it for six months in her own home and scored it 86/100, calling it "a standout medium‑firm hybrid for side or combination sleepers and couples who want low motion transfer" with "neutral temperature, strong edge support and a practical washable cover".

The construction is the usual hybrid sandwich done well: graphite-infused Simbatex foam for cushioning, Aerocoil microsprings near the surface for responsive lift and airflow, and deeper support springs targeting hips. It's a 28cm tall hybrid from the UK-based brand, and Simba is B-Corp certified, which is a tick we'll take if the price is the same either way.

The caveat — and it's the same caveat across nearly every published review — is firmness. TechRadar rated the sleep surface at around 8 out of 10 for firmness, perfect for average to heavy weight sleepers across all sleep styles; heavier testers found it especially comfortable, but lightweight testers found it a bit too firm, especially for side sleeping. If you're slight, look at the GO or the Nectar instead.

Pricing on Simba's own site starts at £799 for a double on the current promotion, with the usual 200-night trial and 10-year guarantee. Realistically, Simba runs a sale every other Tuesday, so don't pay RRP.

Our verdict: The default answer for most UK side sleepers between roughly 60–110kg. Order it, sleep on it for a month, and only worry if you genuinely can't get comfortable.

The positives:

• Three spring layers plus wool comfort layer; medium-firm feel that suits most side sleepers
• Mumsnet's six-month real-home test scored it 86/100
• B-Corp certified UK brand with a 200-night trial and 10-year guarantee
• Strong edge support — useful if you sleep right at the edge of a double
• 28cm depth fits standard UK fitted sheets without a fight

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2. Nectar Premier Hybrid — best for the long trial

If you're the sort of person who needs to be talked out of returning things, Nectar's industry-leading 365-night risk-free sleep trial and Forever Warranty is the headline. Almost a year to decide. We'd happily trade a few features for that kind of safety net.

The mattress itself is medium-firm and available in four sizes, all of which are 28cm deep. The Premier Hybrid pairs Nectar's signature memory foam with a layer of responsive micro-springs and a deep base of encapsulated pocket springs — so you get the contouring shoulder hug that side sleepers want, with enough bounce that you don't feel like you're being slowly digested.

Pricing is the slightly opaque bit. Nectar publishes bundle prices rather than headline mattress prices on most pages, and the platform-bed bundle currently runs £841.70, but a standalone Premier Hybrid double on promotion typically lands a little under that. Old mattress removal is £45 extra — worth it unless you fancy lugging a king-size to the tip in a Vauxhall Corsa.

Our verdict: Buy this if you've been burned by a wrong-firmness mattress before and need the option to send it back in October.

The positives:

• 365-night trial — nearly double Simba and Emma's 200 nights
• Forever Warranty (lifetime, in real money)
• 28cm depth with three layers including pocket springs and micro-springs
• Medium-firm contouring feel that suits classic side sleepers
• £45 optional old mattress removal at checkout

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3. Emma NextGen Premium Plus — best budget hybrid

Emma's marketing is relentless and the discount clock never seems to reset, but the underlying product is genuinely good. The NextGen Premium Plus currently sits at from £342.30 (down from £489) — the cheapest credible option on this list by some distance. On Emma's own firmness scale, the Premium range is rated 5 out of 10 (medium-firm) to ensure correct spinal alignment.

Emma's Original — the wider range's bestseller — is a five-time Which? award winner, which is the kind of credential a lot of UK buyers actually care about. The trial is 200 nights risk-free and the 10-year manufacturer warranty matches the Simba.

The catch is that Emma's range is bewildering — Original, Original Pro, Hybrid Original, Hybrid Premium, NextGen Premium, NextGen Premium Plus, and the discontinued classic Premium. The original Emma Premium was discontinued on 20 September 2023, so don't get tricked into a review that's actually about the old product. For side sleepers specifically, the NextGen Premium Plus is the one to look at because of the supportive zoning.

Our verdict: Get this if your budget tops out around £400 and you don't want to slum it on a generic foam mattress from a high-street warehouse.

The positives:

• From £342.30 in the current sale — the lowest credible price here
• Five-time Which? award winner across the Original range
• Medium-firm (5/10 on Emma's own scale) suits average-weight side sleepers
• 200-night trial and 10-year warranty
• £45 optional mattress removal and recycling

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4. Simba Hybrid Luxe — best premium pick

The Luxe is what you upgrade to when the Pro isn't quite enough. It's a 10-layer design with multiple tiers of springs and foams, firmly in the high-end price bracket; with regular Simba sales you'll typically pay around £1,380 for a double, with a free mattress protector. WhatMattress's UK reader vote in 2026 actually placed it top: the top all-round mattress in the UK according to WhatMattress users in 2026 is the Simba Hybrid Luxe, and it comes with a 200-night comfort trial and a 10-year guarantee, and was awarded the Indy Best Buy 2021 and again in 2024.

For side sleepers specifically, the Luxe is a slightly different proposition to the Pro. Tom's Guide reckons it's especially good for back and stomach sleepers, as well as side sleepers who prefer a slightly firmer mattress, but the sleep surface is cushioned rather than deeply contouring. TechRadar's take was similar: confidently recommended for back or stomach sleepers, comfortable for side sleeping but some side sleepers might prefer a softer model with more body contouring; temperature regulation is decent and edge support is impressive.

Our verdict: Worth the upgrade if you're a sturdier side sleeper, share with a partner who's on their back, and you'd rather buy once and forget. Lightweight pure side sleepers should stick with the Pro or go softer.

The positives:

• WhatMattress UK readers' top pick for 2026
• Indy Best Buy in 2021 and 2024
• 10-layer hybrid construction with strong edge support
• 200-night trial, 10-year guarantee
• Typically discounted to ~£1,380 for a double rather than RRP

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5. Harrison Spinks Canterbury 4450 — best traditional pick

If the entire bed-in-a-box concept gives you the ick, this is your mattress. Mumsnet names the Harrison Spinks Canterbury 4450 its best mattress for side sleepers overall, priced from £759 to £1,459. It's handmade in the UK using natural materials like British wool, Egyptian cotton and flax, all chosen for their breathability and moisture-wicking properties, which are lifesavers if you tend to overheat at night.

You don't get the marketing gloss of the boxed brands and you definitely don't get a year-long trial — Harrison Spinks is a Leeds firm that's been doing this since 1840 and they expect you to know what you want. Side sleepers who run hot, hate foam, and have done this dance before will love it.

Our verdict: The grown-up choice. Buy this if you've already returned two boxed mattresses and want something that smells of wool rather than off-gassing chemicals.

The positives:

• Mums