Question: When did the musical in which Lauren played the role of Miss Honey have its trial run at the Stratford-upon-Avon theatre?  
Sentence (from "Matilda the Musical"): After a twelve-week trial run staged by the Royal Shakespeare Company (RSC) at Stratford-upon-Avon from November 2010 to January 2011, it received its West End premiere on 24 November 2011 at the Cambridge Theatre and its Broadway premiere on 11 April 2013 at the Shubert Theatre.
Relevant evidence: Yes