It was initially believed the review would take around six months but a report is yet to be published.
In a new statement to BBC News, a Met Police officer said: “We have seen the report and made recommendations to the BBC as to which sections of the report may interfere with justice if published.”
BBC News understands the report is now due to be published within the next month.
In June, the BBC said: “This is an extremely important ongoing process, led by an independent reviewer.
“As we have said from the beginning, it is essential we fully understand what was known about concerns regarding Tim Westwood’s conduct during his time with the BBC and this remains the priority.”
A freedom of information request by BBC News earlier this year revealed that the BBC has spent more than £3 million on the review so far.
It is believed Mr Westwood has been interviewed under caution by the Metropolitan Police four times since the broadcast of the joint BBC News and Guardian investigation.
In a statement, police said the offences are alleged to have happened between 1982 and 2016.
Detectives said they interviewed a 66-year-old man under caution last year. There has been no arrest.