The regulator found that that the Northumberland Provident and Benevolent fund had lent Mr Lavery £72,500 to buy a house in 1994. 13 years on, the union Mr Lavery was then running forgave the loan to Mr Lavery. So he was £72,500 the richer.
But there's more. He'd been paying into an endowment fund to pay back the capital cost of the house. It had underperformed, but it still paid out £18,000. The regulator found Mr Lavery kept that too.
And that's not all.
The regulator found that in 2005, Mr Lavery sold a 15% stake in his house to the Union for £36,000. In 2013 the house was worth less, so he bought it back from the union for £27,500 - a notional profit of £8,500.
And then there's Mr Lavery's "termination payments", totalling £89,887.83. However, that total is a matter of some dispute between him and the union.
The regulator says that neither Mr Lavery nor the union could provide documentary evidence of the process or the decision by which Mr Lavery was made redundant - or why, given he was leaving for a job as an MP, he needed any redundancy payments at all.
Adding £89,887 he received for his undocumented redundancy package to the £72,500 for the forgiven house loan to the £18,000 he was gifted from his endowment, that totals £180,387.