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Integrated Management
System Certification

IMS Certification


Please see the attached Certificate of Conformity of the Factory Production Control in respect of EN 13108-1:2006, EN 13108-4:2006, and EN 13108-5:2006 for Bitumous mixtures characterised as Asphalt Concrete, Hot Rolled Asphalt and Stone Mastic Asphalt.

Leiths operate in accordance with the following BSI Standards:

• PAS99: Our IMR Certificate number is IMR 78163.

• Quality Management Standard: BS EN ISO 9001.

• Environmental Management Standards: BS EN ISO 14001.

• Health and Safety Management Standards: OHSAS 18001.

• Energy Management System: ISO 50001

UKAS Accreditation

Our laboratory is registered to ISO/IEC 17025; the general requirements for the competence of testing and calibration laboratories.

Our schedule of accreditation and UKAS certificate number is: 1908.

Ready-Mix Concrete

Our concrete production is kitemarked to BS EN 206-1 & BS 8500-2; the following sites are registered to these standards:

  • Blackhills (Aberdeen): KM 35653
  • Dornie (Fort William): KM 575102
  • Loch-hills (Aberdeen): KM 88041
  • Torrin (Skye): KM 68270

Factory Production Control: Aggregates for skid resistant surfaces

We have factory production control registration, conformity attestation level 2 plus, for aggregate materials produced at our Edston and Kishorn sites; this product is registered and audited against EN13043 – Aggregates for bituminous mixtures and surface treatments for roads, airfields and other trafficked areas.
Our FPC certificate number is 0086-CPD-515164.


Our Howies Minerals division is registered to the FEMAS (Feed Materials Assurance Scheme) at the Fort William facility on the west coast of Scotland.
Our FEMAS certificate number is 30601.

Asbestos Removal

Lawrie Demolition is a well established demolition contractor who also specialise in licensed asbestos removal.
Our HSE licence number is 001104410.


We are a member of the ACHILLES vendor accreditation scheme.
Our Achilles certificate number is 701939.

Achilles UDVB

Leiths are accredited with the Achilles UDVB accreditation.
Our Supplier number is 057196.

Click here to view our Certificate of Registration and Certificate of Assessment.


Leiths are a member of Constructionline, the UK's largest register for pre-qualified contractors and consultants.
Our Certificate number is 45042.

Markon are also a member of Constructionline.  Their Certificate number is 3954.

Lawrie Demolition are also a member of Constructionline.  Their Certificate number is 46667.


Leiths are a member of the Altius vendor accreditation scheme.

Click here to view our certificate. Award number 423126. 

Mineral Products Association

Leiths are a member of the MPA (Mineral Processing Association).


Leiths are a member of the Freight Transport Association.
Our certificate number is 55409.

British Safety Council

Leiths are a member of the British Safety Council.
Our membership number is S0392604-AB123LR.

Click here to view our Certificate.


Leiths are a member of CECA Scotland (Civil Engineering Contractors Association).
Our certificate number is 64.

Markon is also a member of CECA. Their certificate number is 49.


  • Leiths are a member of Safecontractor – click here to view Certificate.
  • Lawrie Demolition are a member of Safecontractor – click here to view Certificate.
  • Markon are a member of Safecontractor – click here to view Certificate.
  • M&M Road Surfacing are a member of Safecontractor – click here to view Certificate.

Road Safety Markings Association

Markon is a member of the Road Safety Markings Association.

Safe Plane

Markon is a member of the Federation of Planing Contractors.
Their certificate number is FPC 0020 Mar.

Builder’s Profile

Leiths are members of Builder’s Profile. 


Markon is a BBA approved installer for the HAPAS high friction surfacing system.
Their installer number is 3524. 


Lawrie and Markon are members of CHAS.


Lawrie is a member of the NFDC.


Leiths are members of the RHA.



Tel: 01224 876333
Fax: 01224 876332

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