In a letter to the Crown Prosecution Service, they call for a re-assessment of evidence from 93 alleged victims whose cases were never prosecuted.
Worboys was convicted of 19 crimes on evidence from 12 victims, but police said later they believed he attacked up to 102 victims.
Lawyers believe there were 105 victims.
The letter, from solicitors Slater and Gordon and Birnberg Pierce, says victims were assured after Worboys’ conviction that he would “not be coming out for a long time.”
Last week, the Parole Board agreed to his imminent release after he had served a year more than his minimum eight-year sentence.