Browne Jacobson advises Phenna Group on acquisition of Calibre Environmental

UK and Ireland law firm Browne Jacobson has advised Phenna Group on its acquisition of environmental consultancy Calibre Environmental.

Nottingham-headquartered Phenna Group is a leading global provider of testing, inspection, certification and compliance (TICC) services and invests in and partners with selected niche, independent TICC companies that serve a variety of sectors, ensuring customers' peace of mind by delivering first class testing and assurance services. 

The acquisition of Calibre is Phenna Group’s fourth deal of 2025 as it continues its electric start to the year.

Calibre will join Phenna Group’s market-leading Built Environment division alongside Sayvol Environmental & Building Services, Trident Water Solutions and Evolution. 

Calibre Environmental was founded in 1995 and specialises in delivering solutions for water hygiene and water treatment.

The Browne Jacobson team advising Phenna Group on the deal was led by partners Matt Bolton and Clare Hanna and associate Abigail Noakes, supported by associate Jack Milnthorpe and legal assistant Holly Cook (corporate), senior associate Christian Burchardt (tax) and partner Cat Driscoll (commercial). A multi-disciplinary Browne Jacobson team carried out legal due diligence for Phenna Group.

Matt Bolton, Partner at Browne Jacobson, said:

“We’re proud to be supporting Phenna Group on its high growth journey. The acquisition of Calibre Environmental is Phenna Group’s fourth deal of 2025 and further strengthens Phenna Group’s market-leading Built Environment division. This acquisition adds to the Group’s leading water testing expertise alongside businesses Sayvol, Trident and Evolution Water. Congratulations to all involved.”

Tom Gray, Group General Counsel at Phenna Group, said:

“I am grateful to the corporate team at Browne Jacobson led by Matt Bolton for acting on another successful transaction for Phenna Group. The team show good commercial focus and help us execute transactions swiftly enabling us to meet our ambitious acquisitions plan which is critical for us.”

Brian Shannon, Built Environment Divisional MD at Phenna Group, added: 

"This acquisition is a fantastic addition to our Built Environment division. Calibre Environmental's reputation for excellence in water hygiene and treatment complements our capabilities. Combined with Sayvol's. Their expertise will further enhance our service offering across the Built Environment, allowing us to deliver even greater value to our customers."

Phil Marshall, CEO of Phenna Group, added:

"I'm delighted to welcome the Calibre Environmental team to Phenna Group. Their dedication to quality and customer service aligns perfectly with our values. We look forward to supporting their continued success and growth as part of Sayvol and our expanding Built Environment division. Together, we are building a stronger, more comprehensive offering for our clients, and I'm excited for what the future holds."

Browne Jacobson’s energy and infrastructure practice focuses on providing solutions for the sector in innovation, sustainability and investment in clean technology – supporting clients to advance the net zero agenda while ensuring projects achieve their full potential. The firm’s offering covers the full asset life cycle in the energy and infrastructure industry, from technological concept through to operational aspects and asset transactions, and including regulatory, procurement, development, planning and authorisation, raising of equity and debt capital, and everyday operations.

Recent projects which the firm has advised on include multinational tunnelling and mining corporate PBE Group on its multi-jurisdictional corporate financing arrangements and advising Folkestone and Hythe District Council in relation to Otterpool Park, a flagship garden town project with an estimated gross development value of £2.8bn.