Lester Aldridge Advises on Sale of BMS to Celnor Group

Lester Aldridge is pleased to announce its role advising Roy Stansbury, founder of Building Monitoring Services (BMS), on the successful sale to Celnor.

Established in 1994 and operating predominantly across the South and South East of England, BMS provides independent risk assessment, monitoring and compliance services for Legionella control and Indoor Air Quality (IAQ). With a strong reputation for technical expertise and impartial reporting, BMS helps organisations meet regulatory requirements while promoting safer and healthier environments. The integration into Celnor Group will allow BMS to leverage a broader network and significantly enhance its compliance and risk‑management offerings.

Lester Aldridge provided comprehensive legal support across all stages of the transaction, including deal structuring, due diligence, and the share purchase agreement. The firm collaborated closely with BMS’s other advisers, including Adam Street Advisers, to ensure a successful and efficient closing.

With offices in London, Bournemouth and Southampton, Lester Aldridge advises clients across the UK and internationally. Recognised for its deep expertise in corporate transactions and advisory services, it is trusted by businesses and entrepreneurs for its committed, client-focused approach.

The team at Lester Aldridge consisted of Partners Grant Esterhuizen, along with Senior Associate Danielle Slater and Associate Gerard Chalkly-Maber.

Roy Stansbury, Founder of BMS, said:
“Working with Lester Aldridge has been instrumental in ensuring the smooth progress of our transaction. Their clear guidance, commercial insight, and meticulous attention to detail gave me complete confidence in navigating the sale to Celnor. This partnership marks a major milestone for BMS, and I’m grateful for Lester Aldridge’s exceptional support.”

Grant Esterhuizen, Head of the Corporate & Commercial Group at Lester Aldridge, added:
“We are delighted to have supported Roy through this important transaction. BMS’s strong market reputation and technical excellence make them a perfect fit for Celnor’s vision. It’s been a pleasure to work closely with Roy and his entire team, and we’re excited to see how BMS will thrive within Celnor’s expanding Risk Management division.”

Photo, left to right: Grant Esterhuizen, Gerard Chalkly-Maber and Danielle Slater.