A tangent to the topic: I didn't know Maggie Task was a Mrs. Lovett standby, but I think she originally had the Miss Hannigan role in Annie early on till Mike Nichols replaced her with Dorothy Loudon. The creators felt that Task's interpretation of Hannigan was too one-dimensionally dark and mean. Was Task a standby for Lansbury or Loudon? I know Lor was a standby for Loudon.
Maggie Task was an original cast member listed as "Member of the Company" and in the smaller print below the cast she was listed as understudy to Lansbury. (As company replacements during the run IBDB lists the others as follows, Standbys: Denise Lor (Mrs. Lovett), Marge Redmond (Mrs. Lovett).