She first worked for the London District Theatre Unit as an actress and costume designer, before joining the
Players' Theatre costume department during the Second World War. She was known for her meticulous historical research, and for using ordinary everyday clothes of the period, rather than "costumes". It was most recently revived in 2017, using Vercoe's costume design, which reviewers still comment on, "the mafia concept, although prolific in opera stagings these days, is still a perfect fit for Rigoletto". London's
Victoria and Albert Museum includes Vercoe's costumes from the 1979
English National Opera production of
The Turn of the Screw. The V&A also houses her extensive archives. ==Personal life==