Female
Olivia, an orphan girl, 10-12 years old [who is also The Daughter in “Trial By Judge”]
Mrs. Murdstone, a cruel, tyrannical middle-aged Harridan in charge of an Orphanage
Eliza Doolittle, leader of the group of flower-sellers
Annie, well-spoken flower-seller
Queenie, a flower-seller
Doris, a flower-seller
Flo, a flower-seller
Mrs. Dilber, middle-aged owner of a Poor School, as nice as Mrs.Murdstone is nasty
Mrs. Hudson, Sherlock Holmes’ housekeeper
Emily & Charlotte, Poor School girls.
plus:-
Placard Girl, Chorus of Orphans, Poor School girls, Londoners & opera-goers, and Chorus in “Trial By Judge”
Male
Dicken, handyman at the orphanage, not the brightest knife in the draw, but kindly
Ebenezer Scrooge
George Bernard Shaw
Fagin [who can also be The Judge in “Trial By Judge”]
The Artful Dodger [who is also The Criminal in “Trial By Judge”]
Lamplighter
Sherlock Holmes
Doctor Watson
The Usher in “Trial By Judge” [could be female]
The Judge in “Trial By Judge” [if not Fagin]
The Policeman in “Trial By Judge”
plus:-
Chorus of Londoners, Fagin’s “Ghost Gang”, opera-goers, Chorus in “Trial By Judge”
 
Click the "Script & Songs" tab to read the script, look at the score and listen to the songs.