Harrison Spinks Collingham 3250 Pocket Single Mattress
The Harrison Spinks Collingham 3250 is a pocket spring mattress handcrafted in the UK, rated as medium in feel.
- No memory foam, just natural fillings
- Breathable build for hot sleepers
- Minimises partner disturbance
£749
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Harrison Spinks Collingham 3250 Pocket Mattress
More available sizes
Mattress details
Mattress
Harrison Spinks Collingham 3250 Pocket Mattress
Size
Firmness
Medium Firm
Construction
Pocket Spring
Wool
Natural
Depth (cm)
22
Layers
4
Layer Details
Cover
A soft blend of wool and viscose that is fire resistant and chemical free. That means no chemical fire retardant treatments against your skin.
Comfort layer
Traceable British wool forms the soft cushioning layer. Wool naturally regulates temperature, which means less overheating on warm nights.
Interior blend
A blend of cotton, hemp and flax sits within the interior. These natural fibres add breathable padding between you and the springs.
Support system
2500 high density pocket springs, each 100% glue free and encased in its own fabric pocket, including award winning Advanced Cortec pocket springs. Individual pockets mean each spring moves independently, so you feel less of your partner's movement.
Layer details from mattressonline.co.uk product page, September 2026.
Key benefits
- Natural fillings in a child-friendly size: Traceable British wool with cotton, hemp and flax, which means a breathable, chemical-free sleep surface, reassuring for parents choosing a mattress a child will use for years.
- A medium firm feel for growing sleepers: The medium firm support suits children, teens and lighter adults, who often find very firm mattresses uncomfortable at this stage.
- Fits raised and cabin frames: At 22cm deep it stays within the guard rail limits of most bunk and mid sleeper frames, though check your frame's stated maximum before ordering.
- Room to spare in small spaces: At 90cm wide the UK single leaves floor space for a desk, wardrobe or toy storage, and slots under a loft conversion slope where wider sizes will not.
- Cheap, easy bedding: Standard single fitted sheets and a 135 x 200cm duvet fit, and both are the cheapest and most widely stocked bedding of any UK size.
This size suits you if...
You're buying for a child or teenager and want natural materials rather than foam, you're furnishing a guest room or a spare room that doubles as an office, or you sleep alone in a compact bedroom, a student room or a first flat where 90cm of width is what the space allows.
Consider another size if...
You're an adult who spreads out in the night, or you share the bed even occasionally. We'd recommend the Collingham 3250 in a UK double instead, which is 45cm wider and the same length; allow at least 2.6m x 2.8m of floor space for it.
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FAQ's
Is the Collingham 3250 UK single suitable for a bunk bed?
In most cases, yes. The mattress is 22cm deep, which sits within the safety limits of most bunk, cabin and mid sleeper frames, where the guard rail needs to stand well above the mattress surface. Frames vary, so check the maximum mattress depth your frame's maker specifies before you buy.
Is the Collingham 3250 in a UK single good for a child?
It's a strong fit. The medium firm feel gives growing sleepers support without the hardness children often dislike, and the fillings are wool, cotton, hemp and flax with a chemical-free, fire resistant cover, so there's no memory foam or chemical fire retardant treatment against their skin. It's a premium spend for a child's room, but one built to last.
What room size do I need for a UK single mattress?
We suggest allowing at least 2.1m x 2.8m of floor space. That leaves enough clearance to walk round the bed and open drawers or a wardrobe. At 90cm wide, the UK single is the easiest size to place: it fits box rooms, loft conversions with sloping ceilings, and guest rooms where you want two beds with a walkway between them.
Can an adult sleep on a UK single comfortably?
Yes, if you sleep alone and fairly still. At 90cm wide and 190cm long, the UK single suits most solo adults, and the medium firm pocket spring build supports lighter and average weight sleepers well. Taller adults, or anyone who shifts around a lot at night, will be happier sizing up to the UK double, which is 45cm wider.
Where can I buy the Collingham 3250 in a single?
Availability changes, so the most reliable answer is the live price table on this page, which is updated as retailers change their prices and stock. Compare the retailers listed here rather than searching blind, as smaller sizes of handcrafted mattresses like this one aren't stocked everywhere.