Deal verdict
The Harrison Spinks Canterbury 4450 Mattress is the better deal today.
It is at a genuine low, while the Hypnos Alcester Ortho Extra Mattress has been cheaper. Both cost £1,129 today.
Mattress Next Day
Good time to buy
£1,129 Double
£1,129 is a genuine low. Today is the only day in the 69 days we've tracked it's been this cheap.
Checked
Mattress Online
Worth waiting
£1,129 Double
Shown as reduced from £1,306
It's been cheaper. It was £917 on 13 Nov 2026. It's been £1,129 or less for 100% of the 34 days we've tracked.
Checked
| Harrison Spinks Canterbury 4450 Mattress | Hypnos Alcester Ortho Extra Mattress | |
|---|---|---|
| Firmness | Medium firm | Firm |
| Warranty | 10 years | 10 years |
| Sizes | Size not stated, - Small Single, Single, EU Single, - Long Small Single, Small Double, Double, - King Size, EU Double, EU King, - King Size Zip & Link, - Super King, - Super King Zip & Link | Single, Small Double, Double, EU Double, King, EU King, Superking, Emperor, Superking Zip and Link |
Specs are the figures each retailer publishes. Prices are for the size shown above.