At the height of the first wave of the coronavirus pandemic, the former prime minister lobbied lower level ministers, civil servants and cabinet ministers, including the Chancellor, Rishi Sunak, then Health Secretary Matt Hancock, to gain access to public loan programs - knowing that he could make over £ 40million successfully.
As the scandal unfolded, it emerged that the Cabinet Office of Francis Maude, who now advises Johnson on Whitehall, allowed senior officials to simultaneously moonlight for Greensill .
Announcing a fully independent investigation in mid-April, Johnson said Boardman would have "carte blanche" to recommend changes to lobbying rules andcould review official documents.
But suspicions that the report could be a sting - and a practical way to vent the heat of a growing scandal of cronyism and corruption - were raised immediately.
The terms of reference of the survey remained narrowly focused on "the use of development finance for the supply chain in government "and avoided the real problem of lobbying.
The testimony would remain in private and Boardman did not have the power to call witnesses.
And then there were Boardman's close ties to a ministry at the center of the Greensill scandal. The Department for Business, Energy and Industrial Strategy (BEIS), where Boardman was a non-executive director, requested moresits "progress" updates on Greensill's application to the Coronavirus Business Interruption Loan Program.
It is also appeared that Boardman, the son of a Tory minister, had been a member of the party until the turn of the century and had already stood for election to Islington council.
Senior officials began to fear the worst when Suzanne Heywood , Jeremy Heywood's widow, has been advised by Boardman that neither he nor a third party will be permitted to testify at the inquest on his behalf.
Evidence uncovered by Boardman shows Heywood helped Greensill goes to the very heart of government. In a revealing email, the former cabinet secretary emailed a colleague saying: "Lex devotes a great deal of his personal time to HMG and needs to occasionally use # 10 to welcome senior business people.
"Let's talk tonight if you have any reservations.
In his report, Boardman's findings on lobbying made transparency activists question whether he had observed the same events.
" Engagement between the government and a wide range of stakeholders, what many refer to as 'lobbying', "is vital for the proper functioning of democracy, " Boardman said.
"This can provide decision makers with information and data, and allow governments to understand the impactpublic policies on those it may affect. It is fundamental that lawmakers and the executive listen to voters. "
Questions remain unanswered as to the minister who authorized Heywood to allow Greensill to enter Whitehall , why Sunak, Hancock and others were so willing to accept calls from Cameron lobbying on behalf of Greensill, and whether the rules regarding lobbying and transparency need to be tightened.
Parliamentarian Greensill inquiries are well underway. William Wragg, Conservative Chairman of the Committee on Public Administration and Constitutional Affairs, is expected to call Boardman himself to testify on the matter. independent review by the Prime Minister. While his government has evaded criticism in this report, Greensillcould cause problems for Johnson, however.