Steve, you said (italics not working again)
"By the way, you alleged that Chakrabarti was promised a peerage in return for a whitewash."

If she was offered a peerage before the report came out, then it is perfectly reasonable to assume it was intended to influence it.

That is why Streeting said it "stinks" and it "undermines" the "remaining credibilty" of her report.

Her interviewer must have known well before about the offer or he would not have raised the issue.
She refused to answer, so she obviously was aware of it too and realised how bad it looked.
https://www.youtube.com/watch?v=OKutU_BF2Mw