Benchmark International Advises on the Sale of Henderson Site Services Ltd to Western Thermal Ltd

Benchmark International is delighted to announce the sale of Henderson Site Services Ltd to Western Thermal Ltd.

Henderson Site Services, trading as HSS and a subsidiary of N&S Holdings Ltd, operates UK-wide from its base in Blandon-on-Tyne. It is a mechanical and insulation contractor that fabricates, installs and modulates all manner of pipework systems, vessels and structures. It was originally formed as PSL in 1988 prior to a merger in 2009 with the site engineering division of Henderson Process Systems Ltd.

Western Thermal was established in 1985 and offers thermal insulation to the building services and industrial markets in the UK. The acquisition expands Western Thermal’s service offering and Henderson Site Services’ global outlook is in-line with Western Thermal’s growth strategy. This is a major strategic and earnings enhancing acquisition for the company, as it adds a further highly complementary skillset to Western Thermal’s already broad construction offering and also to the other industries it serves including pharmaceuticals, food processing, petrochemicals healthcare, leisure, and infrastructure.

Trevor Horsley, founder of Western Thermal, said:  “The HSS acquisition adds to Western Thermal’s already fast-growing business and, being entirely complementary in its skillset, represents a great step forward in terms of deliverability to the major industry players.”

Reflecting on the process, Joseph Henderson, Managing Director of Henderson Site Services said: “We have had a positive experience with Benchmark [International]. This was due to the required conclusion being realised, and the excellent work conducted by the Benchmark team.”

On behalf of everyone at Benchmark International, we would like to wish both parties every success for the future.


Benchmark International’s global offices provide business owners in the middle market and lower middle market with creative, value-maximizing solutions for growing and exiting their businesses. To date, Benchmark International has handled engagements in excess of $5B across 30 industries worldwide. With decades of global M&A experience, Benchmark International’s deal teams, working from 13 offices across the world, have assisted hundreds of owners with achieving their personal objectives and ensuring the continued growth of their businesses.

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