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GS

GSO LIMITED

Willington
SME

Reef Cleaning Solutions is a contract cleaning company that offers supplementary specialist and support services. They focus on delivering high-quality cleaning solutions across various sectors including education, commercial offices, and industrial environments.

reef-cleaning.co.uk ↗

Summary from the supplier’s website — unverified

Compare peers
Awarded
£13.4m
Live
14
Buyers
14
12m
£6.8m
At a glance
  • Quick answer
Profile
  • Social value
  • ESG & policies
  • Capabilities
  • Buyer references
  • Accreditations
Track record · verified
  • KPI performance
  • Contracts14 / 17
  • Top buyers14
  • Category mix
  • Geography
  • Peers5
Trust & risk
  • Red flags0
  • Compliance
  • Modifications
  • News
Company
  • Companies House
  • Financial
  • Org tree
Quick answer — GSO LIMITEDUpdated 13 Jul 2026

At a glance · for buyers and watchdogs

GSO LIMITED has won £13.4m across 14 public-sector buyers, with 14 live contracts. No active Companies House risk flags.

Why: top buyer Ambition Education Trust at 26% · 0 active risk flags · 0 modifications.

Decision signals
0Active red flags
ActiveCompany status
14 of 17Live contracts
26%Top-buyer concentration
—Category exposure
0Contract modifications
If you're a buyer:CapabilitiesReferencesKPIComplianceWatchdog?FlagsModificationsConcentrationNews

Social value

Commitments mapped to the Government Social Value Model themes.

⚑ Self-reported
—

No social-value commitments yet

Jobs, skills, environmental, inequality and community commitments appear here once a claimed supplier attributes them to awarded contracts, or once we detect them on the supplier’s website.

ESG & policies vault · 0/5

Key governance & sustainability policies. Published documents link out; missing ones are greyed.

↔ Cross-checked
Net-zero planNot provided✓
Modern slavery statementNot provided✓
EDI policyNot provided✓
Anti-briberyNot provided✓
Data protectionNot provided✓

Capabilities

What this supplier does, where they sit, who they sell to.

◐ From website & notices
Sectors served · 1/8
Central government✓
Local government✓
NHS & health✓
Housing✓
Utilities & energy✓
Financial services✓
Education✓
Defence✓
Services · 3
Contract CleaningFully managed cleaning services tailored to various sectors including educational establishments and commercial offices. ↗Support ServicesAdditional services such as window cleaning, washroom products, and deep cleans. ↗Specialist CleaningIncludes antiviral fogging, pressure washing, and carpet cleaning. ↗

Extracted automatically from reef-cleaning.co.uk on Jul 2026. Not independently verified — treat as the supplier’s own marketing claims.

Case studies

Delivery stories the supplier has published, with sector and outcome.

⚑ Self-reported
—

No case studies yet

Once a claimed supplier publishes delivery stories — the buyer, the sector, what was delivered and the outcome — they appear here.

Buyer references

Named public-sector contacts who have agreed to act as a reference.

✓ Confirmed by buyer
—

No buyer references yet

Public-sector buyers can confirm they'll act as a reference for this supplier. Confirmed references — with the contract they relate to — show here.

Accreditations & memberships · 1

Credentials listed on the supplier’s website. Not yet checked against issuer registers.

◐ From supplier website
Core credentials · 1/6
Cyber EssentialsNot evidenced✓
Cyber Essentials PlusNot evidenced✓
ISO 27001 — Information securityNot evidenced✓
ISO 9001 — QualityISO✓
ISO 14001 — EnvironmentalNot evidenced✓
ISO 45001 — Health & safetyNot evidenced✓

Extracted automatically from reef-cleaning.co.uk on Jul 2026. Not independently verified — treat as the supplier’s own marketing claims.

KPI performance

Delivery, budget and satisfaction scores reported quarterly by buyers.

✓ Verified
84

No verified KPI scores yet

Once buyers report contract KPIs — delivery on time, on budget, satisfaction, adoption and accessibility — a weighted grade and breakdown appear here.

Contracts · 14 live · 3 historic

Pulled from Contracts Finder & Find a Tender. Most recent first.

✓ From notices
TitleBuyerCPVAwardedValueTermStatus
Robin Hood Multi Academy Trust - Cleaning Services Tender
Robin Hood Multi Academy Trust—01 Aug 2026£645k3 yrsLive
The CAM Academy Trust - Cleaning Services Tender
The CAM Academy Trust—01 Aug 2026£2.3m3 yrspending
Ambition Education Trust ~ Cleaning Tender
Ambition Education Trust—29 Apr 2026£3.5m2.9 yrspending
All Saints Catholic College ~ Cleaning Tender
All Saints Catholic College (RM&C)—01 Jan 2026£310k3 yrspending
ACES Academies Trust ~ Cleaning Tender
Aces Academies Trust9091930001 Aug 2025£2.4m5 yrsLive
Holy Cross Catholic Multi Academy Company - Cleaning Services Tender
Holy Cross Catholic Multi Academy Company9091930001 Aug 2025£2.5m5 yrsLive
St Thomas More Catholic School & Sixth Form (Holy Spirit Catholic Multi Academy) ~ Cleaning Tender
St Thomas More Catholic Academy & Sixth Form College9091930001 Aug 2025£956k6 yrsLive
Chelsea Academy~ Cleaning Tender
Chelsea Academy (RM&C)9091930001 Sept 2024£733k3 yrsLive
Chelsea Academy~ Cleaning Tender
Chelsea Academy (RM&C)————Live
The CAM Academy Trust - Cleaning Services Tender
Cambourne Village College————Live
Total live value £7.3m · mean award £790k1–10 of 17

Top buyers · 14 buyers · top 3 = 63%

Share of awarded value. Concentration fires above 40% for any single buyer.

✓ From notices
1
Ambition Education Trust
1 contract
26%
since 2025
2
Holy Cross Catholic Multi Academy Company
2 contracts
19%
since 2025
3
Aces Academies Trust
1 contract
18%
since 2025
4
The CAM Academy Trust
1 contract
17%
since 2026
5
St Thomas More Catholic Academy & Sixth Form College
1 contract
7%
since 2025
6
Chelsea Academy (RM&C)
2 contracts
5%
since 2024
7
Robin Hood Multi Academy Trust
2 contracts
5%
since 2026
8
All Saints Catholic College (RM&C)
1 contract
2%
since 2025
9
Cambourne Village College
1 contract
0%
10
Ousedale School
1 contract
0%

Geography

Distribution of awarded value by buyer region.

✓ From notices
UK · schematic only
Eastern6 contracts
66%
West Midlands5 contracts
25%
London3 contracts
8%
South East2 contracts
0%

Peers

Suppliers with overlapping CPVs & buyers (last 24m). GSO LIMITED highlighted.

✓ From notices
SupplierSME?Awarded · 24mContracts
OG
OCS Group UK Limited
No£13.0m2
TL
Totally Local Company Ltd
Yes£7.4m1
OS
ORIAN SOLUTIONS LIMITED
No£7.0m2
GS
GSO LIMITED
Yes£6.8m—
CC
CHURCHILL CONTRACT SERVICES LIMITED
No£6.0m7
KC
KGB CLEANING SOUTH WEST LIMITED
No£6.0m2
Compare peers →

Red flags · 0 active

Automated scan of Companies House status, charges and insolvency records.

✓ Verified
✓ Clean. No active risk signals from Companies House status, charges or insolvency records.

Compliance scorecard

Derived from Companies House filings — not a full supplier-assurance check.

↔ Cross-checked
Trading status
Active
Live at Companies House
Annual accounts
Up to date
Last made up to 31 Mar 2025
Confirmation statement
Up to date
Next due 24 Jan 2027
Outstanding charges
0
No charges registered
Insolvency history
None
No insolvency cases registered
Certifications (ISO, Cyber Essentials, Living Wage, B-Corp, modern-slavery) are supplier self-reported and appear once a claimed profile adds them.

Modifications

Variations to awarded contracts logged under Procurement Act 2023 s.74.

✓ From notices
±

No modifications recorded

No published contract variations for this supplier. Modification notices appear here as they are issued under the Procurement Act 2023.

News mentions

UK trade press & nationals, matched to this supplier.

◰

No news mentions found

We haven't matched any recent UK press coverage to this supplier. Mentions appear here automatically as they're published.

Companies House

Live sync — registered details, directors, PSC and SIC codes.

✓ Live sync

Registered details

Company no.
08355246
Status
Active
Type
Private limited
Incorporated
10 Jan 2013
Reg. office
Cheribourne House, 45a Station Road, Willington, Bedford, MK44 3QL
SIC codes
81299
Last accounts
31 Mar 2025
Next accounts due
31 Dec 2026

Directors & PSC

  • GRAY, Marcus Alexander — director
    Appointed 05 Apr 2024
  • OSBORNE, George — director
    Appointed 05 Apr 2024
  • Osgr Limited — person with significant control
    ownership of shares 75 to 100 percent

Financial

Filed accounts from Companies House.

↔ From Cos House
£

No financial filings on record

Turnover, profit and headcount appear here once audited or micro-entity accounts are filed at Companies House.

Org tree

Group structure and ownership.

↔ From Cos House
GSO LIMITED
08355246 · this company

Independent. No parent company or subsidiaries recorded at Companies House for this entity.