One supplier told the Enquirer: “Galliford Try have traditionally tried to hold on to money in June and December and subcontractors have not been paid in those months irrespective of when payless notices were to be issued and final dates for payment arose.

“That is now being seen in contract payment schedules where it states that June and December payments will be ‘moved to align with company accounting procedures’.”

Galliford Try’s half year accounts cover the six month periods to the end of June and December each year.

The latest results announcement highlighted Galliford Try’s cash reserves of £195m following the sale of its housing business.

One subcontractor said: “Some of that liquidity is also money that should have been paid quicker to suppliers like me.”

A Galliford Try spokesperson said: “Galliford Try is committed to maintaining collaborative relationships with our supply chain and subcontractors.

“Contractual payment terms are agreed with suppliers. These terms are mutually accepted and we also have similar arrangements to bring forward payments to assist suppliers when needed.

“We remain committed members of the Prompt Payment Code and continue to endeavour to improve our processes and procedure to improve our payment terms.”