Mace is management contractor on the £850m job.

But the Enquirer understands that the fit-out contractor was chosen by Spurs and works directly for the club.

The mechanical, electrical and plumbing work is also believed to be under control of Spurs.

A site source said: “It’s being run mainly by the management contractor but you also have a ‘site within a site’ in terms of the fit out work.

“When you have different procurement routes like this it causes all sorts of problems in terms of site co-ordination and logistics.”

The fit-out contract is understood to be worth between £80m and £100m.

Mace has its own fit-out division but the contract was awarded to another company.