As an Accredited Installer and Diamond Quality Partner (DQP) endorsed by Mitsubishi Electric, all our customers are assured of a reliable standard of service and installation.


We are an approved Daikin D1 Business Partner for the installation of Daikin air conditioning & refrigeration equipment in the UK. Our engineers have been trained in the installation of Daikin equipment.


Toshiba Air Conditioning Approved Partner and Installer

As an approved installer of Toshiba air conditioning systems, we have undergone intensive training on the full range of Toshiba air conditioning products and are able to offer reliable advice on what is best for your particular application.


Sovereign PSL has been awarded and approved by CSQ (Certified Quality Systems) and IAB to be BS EN ISO 9001:2008 certified.


Alcumus SafeContractor is a leading third party accreditation scheme which recognises extremely rigorous standards in health and safety management amongst contractors.


CHAS accredited

CHAS (CONTRACTORS HEALTH & SAFETY) ASSESSMENT ACCREDITATION is a standard developed by the Health and Safety Executive in conjunction with local authority health and safety and procurement professionals.


Sovereign is pleased to announce that it has achieved accreditation from Constructionline and are now a Silver Member.


Gas Safe Register is the official gas registration body for the United Kingdom. We are authorised members of Gas Safe and can provide a number of gas/heating services for commercial clients.

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