Tropus originally made the allegations in a confidential report last year.
WNSL denied most of the claims. A spokesperson said: "By their [Tropus'] own admission, the report is partial and only deals with a small proportion of the Wembley story. It deals with events of two years ago – we are much more interested in the future."
The spokesperson said WNSL did accept criticisms made in an alternative report by government troubleshooter David James. James investigated Tropus' allegations but found that there was "no evidence of any criminality or impropriety".
The Tropus report into Wembley deals with events two years ago
WNSL spokesperson
However, the James report was critical of WNSL's corporate governance structure and the subsidiary's board was revamped in response to the report's findings.
WNSL said funding for the national stadium would be in place within weeks. A deal is expected to be struck with German bank WestLB by the middle of the summer.
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