In 2014-15, Rebecca was a visiting student on the MA in Opera Making at the Guildhall School of Music and Drama, working with the composer Oliver Christophe Leith. Their chamber opera, Isabella
, premiered on 8 July 2015, with subsequent performances at the Royal Opera House (London) and the Liszt Academy (Budapest).
Other staged works include Tatort: Märchenland
(2015), a fairy-tale detective story co-written with Stephen Plaice for the Munich Radio Orchestra, and After the Fall
(2017), a chamber opera written with the composer Helgi Rafn Ingvarsson.
Rebecca is a founder member of the Voicings Collective
: an Arts Council England funded ensemble creating exploratory choral theatre.