This was a reasonable production of an excellent musical, but I recommend the George Hearn / Angela Lansbury version every time.
In a previous comment, alan_cricketman4 from Belfast UK, states: "I can understand producers using artistic licence and having to cut details and chronologically alter events etc., but to change the facts of such a well known and well documented case is just downright silly. I suggest that very little research has been applied here (by producers and reviewers alike) and a good website to browse, and learn further details on the case, is "Court TV CRIME LIBRARY"."
I fact, Sweeney Todd was universally accepted to be an 'urban myth' up to about 1993, due to the lack of other evidence. In 1993, a new book, was published. Of this book, Wikipedia says:
"In his 1993 book Sweeney Todd: The Real Story of the Demon Barber of Fleet, the horror and crime story writer Peter Haining argues that Sweeney Todd was a historical figure who committed his crimes around 1800. However, other researchers who have researched his citations find nothing in these sources to back up what Haining claims they said".
I realise that Wikipedia is not always entirely accurate, but I think it is fair to say that what Mr Haining has done is researched a theory about the origin of Sweeney Todd, which is worthy of consideration, but far from accepted historical truth.