An independent report has accused Ealing, Hounslow and Hammersmith and Fulham primary care trusts of elements of financial and legal mismanagement between 2004 and 2008.
NHS London commissioned PricewaterhouseCoopers to carry out the review into allegations made by a former senior manager at the Ealing PCT-owned management and estates company West London Health Estates and Facilities Management.
Allegations that Ealing and Hammersmith and Fulham PCTs failed to comply with procurement regulations and that Hounslow PCT allowed GPs to occupy the Heart of Hounslow health centre without lease agreements in place were found justified by the report.
Ealing chief executive Robert Creighton said all the issues raised in the report had been addressed by all three PCTs. He said: "We accept and regret there were mistakes."
The independent report is dated 13 October and was published by NHS London on Monday.
To read the report, go to www.london.nhs.uk