Damian McBride compared his activities as Gordon Brown's spin doctor to those of a "rogue trader in the 1980s", saying Labour leaders were unaware of the way he operated.
McBride told ITV's Daybreak: "I'd compare it to when we had some of the rogue bankers ... people weren't asking enough questions about how they were making their profits."
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Health professionals say that 16 people have been struck by the same strain as E.coli after eating blue cheese.
Tom Webb, 22, died after receiving a single stab wound to the chest on January 19 this year.
In the run-up to the Rio Olympic Games, ITV News speaks to four Olympic hopefuls in Team GB. Today we profile BMX rider Liam Phillips.