I've seen a documentary which debunks much of what is in "Brava Two Zero"; maybe that was the investigative report you mention. I've not read the book but I gather it makes him look good. The documentary made him look bad. For example, he was apparently advised to take transport but decided not to, which caused him problems down the line.

I daresay his equipment lists are accurate, though. I really must get around to reading the book and comparing it with other sources. The BBC have done several series on the SAS.