Which mattress brand is which?

 Many mattress brands belong to the same company and trying to figure out who owns what has become a labour of love for me.  But why is this important to know?   Firstly, as mattress construction techniques develop, it becomes apparant that the internal components of many mattresses (belonging to the same holding company) are identicle but sold under differing brand names and of course prices. Knowing this gives you the opportunity to be able to identify similar specifications and selecting the brand that offers the best value for money mattress. 

 The list below is not yet fully authoritative and I would be grateful for any additional information that you may be able to supply particularly in the region of own label brands.

Hilding Anders Group (Sweden)
Dunlopillo – Hilding Anders
Slumberland – Hilding Anders
Myers – Hilding Anders
Staples – Hilding Anders
Jensons Beds – Hilding Anders
Sleepwell – Hilding Anders
Ikea (Own Label – Tbc)

Silentnight Group
Silentnight – Silentnight Group
Layezee – Silentnight Group
Sealy – Silentnight Group
Pocket Spring Bed Company – Silentnight Group
Rest Assured – Silentnight Group
Stearns and Foster – Silentnight Group

Harrison Spinks (UK)
Somnus – Harrison Spinks Beds
Nu-Bed – Harrison Spinks Beds
Harrison – Harrison Spinks Beds
Spink and Edgar – Harrison Spinks Beds
Dreamworld – Harrison Spinks Beds [Tbc]
John Lewis (Tbc Own label)  -  Harrison Spinks Beds [amongst others probably]

Highgate Beds Ltd (UK)
Highgate
Healthopaedic – Highgate Beds
Sleepwise – Highgate Beds
Sleeping Comfort – Highgate Beds

Simmons Group- (Parent Company – Cauval Industries [fr] )
Simmons – Simmons Group
Sleepeezee – Simmons Group
Cumfilux – Simmons Group
Nestledown – Simmons Group

Steinhoff (UK) International Holdings Ltd
Homestyle Operations Ltd
JW Carpenter Ltd
[tbc - In one way or another the following brands / stores are intrinsically linked through the above companies]
Relyon [Brand] (Steinhoff)
Sprung Slumber [Brand] (tbc – Steinhoff)
Bensons for Beds (Homestyle Operations)
Sleepmasters (Homestyle Operations)
The Bed Shed (Homestyle Operations)
Harveys (Steinhoff International – [tbc]Wholly owned / Part of Homestyle Operations)
Cargo (Homestyle Operations / JW Carpenter)
Homestyle (Homestyle Operations  / JW Carpenter)

Keen and Toms Holdings Ltd
Hypnos (Royal warrant holder)

Millbrook Beds Ltd
Millbrook

Flex Equipos De Descanso, S.A.
Vi-Spring Ltd (Subsidiary)

Icon Designs Ltd (UK)
Concept – Icon Designs

Airsprung Furniture Group Plc
Airsprung
Gainsborough Beds
Hush Sleep Collection
Hush-a-Bye
Gainsborough Sofa Beds
Cavendish Upholstery
Airofreem (Foam Supplier)

AJ Foam Ltd. (UK)
Postureflex – AJ Foam

Kaymed (Award winning – deemed to be amongst the best)
Kaymed
King Koil
Odearest
Kaymed SleepSpa
Kaymed Wellbeing
Kaymed Foam

Breasley Consumer Products Ltd (UK)
[Manufactures for many own label retailers]
Breasley 
Salus 
Flexcell 
Amor
Postureform

KozeeSleep Beds Ltd (Dewsbury)
(
Not to be confused with Kozeesleep Beds – West Midlands)
KozeeSleep
Restus

Healthbeds -[Family owned (Smeaton family)]

Burgess Beds – Exclusive bespoke manufacturer

Savoir Beds – Exclusive bespoke manufacturer

GNG Group
Komfi
Implay
Dream Machine