Administrators from Azets blamed both the pandemic followed by labour and material shortages for the collapse of the family-owned specialist contractor.

The Wishaw-based business trading as WMQ Building Services, was founded in 1976 and provided services for the commercial, industrial and residential sectors.

The business expanded rapidly on the back of the growing renewable sector until the pandemic hit.

Staffing peaked at more than 200 in 2019 as revenued topped £20m. But by May 2020, the firm was starting to show the first signs of struggling at revenue plunged £8m running up losses of £2.5m.

Joint administrator and head of restructuring with Azets, Blair Milne will market the assets for sale including work in progress and plant and equipment. Interested parties have been urged to make contact as soon as possible.

Milne said: “Weir & McQuiston was one of Scotland’s leading mechanical and electrical contracting firms with a quality client base and an excellent reputation across the construction industry.

“The directors did everything possible to keep the business trading, however, the scale of cash flow problems and the impact of the lockdown left them with no alternative other than to cease trading and place the company into administration.

“We will now focus on realising as much value from the assets as possible for the creditors and would ask interested parties to contact our Glasgow office as soon as possible.”