Available 
Wentworth Mercer Premium 9000 Pocket Pillow Top Mattress
from £903-£1,815.
£903-£1,815
Sizes tracked: Single, Small Double, Double, King Size, Super King
Harrison Spinks Pocket Sprung
Harrison Spinks Grassington 5750 Pocket Mattress review
A premium-leaning medium-firm pocket sprung mattress with a wool comfort layer, over 5,000 springs and a 100-night trial to help you compare value.
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Last verified: 2026-10-01
Quick verdict
Harrison Spinks Grassington 5750 Pocket Mattress looks like a shortlist option for shoppers who want a medium to firm pocket sprung mattress with a wool comfort layer and a natural-material feel. Mattress Online lists over 5,000 pocket springs, a 100-night comfort trial and a 5-year guarantee, which gives it a stronger reassurance package than many similarly priced pocket sprung mattresses. The trade-off is price: at £919 to £1,799 depending on size, it sits in a more premium part of the market, so it makes most sense if the comfort spec and the reassurance are both important to you.
Available sizes and prices
Harrison Spinks Grassington 5750 Pocket Mattress is listed with 4 size options from £919-£1,799. The visible sizes include Single, Double, King Size, Super King, so use the table to compare the option that matches the exact size, colour, format or specification you want. Always confirm the final checkout price, delivery charge and stock status on the retailer page.
Key product details
These are the retailer details worth checking first for Harrison Spinks Grassington 5750 Pocket Mattress: Brand: Harrison Spinks; Type: Pocket Sprung; Sizes tracked: Single, Double, King Size, Super King; Price range: £919-£1,799. Treat them as a quick fact sheet, then use the retailer page to verify any installation, warranty, delivery or model-number details before buying.
| Brand | Harrison Spinks |
|---|---|
| Type | Pocket Sprung |
| Sizes tracked | Single, Double, King Size, Super King |
| Price range | £919-£1,799 |
| Owner rating signal | 4.6 out of 5 shown; review volume needs checking with the retailer |
| Last checked | 2026-10-01 |
What the product page tells us
The Mattress Online listing presents the Harrison Spinks Grassington 5750 Pocket Mattress as an exclusive model, handcrafted in the UK, with a pocket spring support system and a wool comfort layer. The visible size spread covers Single, Double, King Size and Super King, and the tracked prices run from £919 to £1,799 depending on size. The page also shows free delivery to most locations, a 100-night mattress trial and a 5-year guarantee, all of which are useful checks before you compare it against other pocket sprung mattresses.
What the wider review context suggests
The retailer rating shown is 4.6/5 from 32 visible reviews, which is a positive sign but still a modest sample for a mattress purchase. Independent review presence also exists from The Independent and Which?, so this is not just a retailer-only listing, but the accessible snippets do not reveal the full verdict details. The practical takeaway is that the Grassington 5750 has enough public review presence to be worth considering, but the visible owner-review volume is still too thin to treat the star score as a stand-alone buying verdict. It also looks premium-leaning: at £919, it sits above the median comparable pocket sprung price of £599.
Buyer trade-offs to weigh
If you want a medium-firm feel, the Grassington 5750 is easy to compare because its spec is clearly positioned around pocket springs and wool rather than foam-heavy comfort layers. The main trade-off is whether the natural-material positioning, handcrafted-in-the-UK message and 100-night trial justify spending more than nearby pocket sprung alternatives. You should also check the size you need at checkout, because the jump from Double to King Size and then Super King is significant, and the final price can change the value case quite a bit.
Price and value benchmark
The tracked price range of £919 to £1,799 places this mattress above the median of comparable pocket sprung mattresses, where the benchmark sits at £599. That means it is not a budget choice, even though the Single, Double, King Size and Super King options give useful flexibility for different rooms and bed frames. Value here is less about being the cheapest and more about whether the combination of medium-firm support, wool comfort layer, UK craftsmanship, trial and guarantee matches what you want from a premium pocket sprung mattress. Always confirm the final checkout price before ordering, especially if you are comparing several sizes.
How it compares with nearby alternatives
Compared with softer or firmer pocket sprung alternatives, the Grassington 5750 sits in the middle ground: medium to firm rather than plush or extra-firm. That makes it a reasonable comparison against other Harrison Spinks models such as the Harewood 4250 Pocket Pillow Top Mattress or the Quilted Fusion 4000 Pocket Mattress, as well as non-Harrison Spinks options like the Silentnight UltraGel Cool-to-Touch 3000 Mirapocket Firmer Mattress. If you are deciding between similar pocket sprung mattresses, check whether you prefer a wool comfort layer, a pillow-top feel or a firmer finish, because those details will matter more than the brand name alone.
How much weight to give the review details
The visible 4.6/5 rating is encouraging, but it is backed by only 32 visible reviews, so it should be treated as supporting context rather than a stand-alone verdict. Independent review pages from The Independent and Which? add useful external presence, but the accessible snippets do not show enough detail to turn them into a full confidence score. In practical terms, that means the Mattress Online rating is worth noting, yet you should still verify the comfort trial terms, current price and size availability yourself before deciding.
Who it suits
The Harrison Spinks Grassington 5750 Pocket Mattress is a sensible shortlist option for shoppers who want medium to firm support in a premium-leaning pocket sprung mattress. The wool comfort layer and over 5,000 pocket springs point to everyday comfort with a more traditional, responsive feel, while the Single, Double, King Size and Super King options make it easy to match practical fit as well as comfort. It is especially relevant if you sleep on your back or move between positions and usually prefer a slightly firmer surface rather than a soft, sinky feel. If you are comparing mattress choices mainly on size, reassurance and material feel, this one is worth a close look.
Who should consider other options
If you want a clearly softer or much firmer feel, this medium to firm model may not be the best match and a different pocket sprung mattress would be easier to compare. Budget-led shoppers should also look elsewhere, because the £919 to £1,799 range puts this above many comparable pocket sprung models. If you want a stronger public review base before spending at this level, it is sensible to verify the latest retailer review count and compare it with other mattresses that have more visible owner feedback.
Comfort and support
Comfort-wise, the useful cues are the medium to firm rating, the wool comfort layer and the over 5,000 pocket springs. That combination points to a mattress that aims for responsive support with a more traditional, natural feel rather than a deep foam hug. Because the listing does not give a full technical fill breakdown, it is worth checking the retailer page carefully if you are comparing mattress depth, bed-frame compatibility or any finer construction details before purchase.
Value verdict
On value, the Harrison Spinks Grassington 5750 Pocket Mattress looks best for shoppers who want a premium-leaning pocket sprung mattress and are willing to pay for the reassurance package as well as the spec. The 100-night comfort trial and 5-year guarantee help the case, but the final judgement still depends on whether the current size price matches your budget and whether the medium-firm feel is what you actually want. If you are price-sensitive, compare it with similar pocket sprung alternatives first; if you want a natural-material feel with a clear retailer trial, it becomes more compelling.
Good alternatives to compare
The closest alternatives to compare with Harrison Spinks Grassington 5750 Pocket Mattress include Wentworth Mercer Premium 9000 Pocket Pillow Top Mattress, Sleepeezee Memory Ultimate 4500 Pocket Mattress, Harrison Spinks Quilted Fusion 4000 Pocket Mattress. Use these cards to check whether a nearby model gives you a better price, a more suitable specification or a clearer match for your space and budget.
Available 
Sleepeezee Memory Ultimate 4500 Pocket Mattress
from £949-£1,549.
£949-£1,549
Sizes tracked: Single, Small Double, Double, King Size, Super King
Available 
Harrison Spinks Quilted Fusion 4000 Pocket Mattress
from £799-£1,509.
£799-£1,509
Sizes tracked: Single, Double, King Size, Super King
Retailer details used
Last checked 2026-10-01. The source list below is included to help you check the details behind the comparison. Always confirm the latest price, delivery cost, stock status and product details with the retailer before buying.
More mattresses to compare
These related guides and reviews can help you compare nearby options before buying.
Questions about this mattress
Is the Harrison Spinks Grassington 5750 Pocket Mattress worth shortlisting if I want medium-firm support?
Yes, it is a sensible shortlist candidate if you want a medium to firm pocket sprung mattress with a wool comfort layer and a natural-material feel. The 100-night comfort trial and 5-year guarantee make it easier to compare with other premium pocket sprung models, but the current price still needs to fit your budget.
Which sizes are available and does the price change by size?
The tracked sizes are Single, Double, King Size and Super King, and the price varies from £919 to £1,799 depending on size. Check the retailer page at checkout for the latest price and availability, because stock and pricing can change by size.
How strong is the retailer review details with only 32 visible reviews?
The visible 4.6/5 rating is positive, but 32 reviews is still a modest sample for a mattress purchase. It is useful supporting context, not a stand-alone verdict, so it is best combined with the product spec, trial terms and your own firmness preference.
Does the 100-night trial make it less risky than similar mattresses?
It can make the purchase feel less risky than buying without a comfort trial, but you should still check the return conditions carefully. A 100-night trial is helpful, yet it does not remove the need to compare firmness, size and final checkout price against similar mattresses.
Who is this mattress most likely to suit: side, back or mixed sleepers?
The medium to firm feel suggests it is most relevant to shoppers who generally like a more supportive surface, including some back or mixed-position sleepers. Side sleepers may still consider it, but the key question is whether you prefer medium-firm comfort rather than a softer feel.