Sara Griffiths
From Tardis Wiki, the free Doctor Who reference
Sara Griffiths (born 12 July 1968[1]) played Ray in the Doctor Who television story Delta and the Bannermen and voiced Claudia Bridge in the Big Finish audio story I.D. Griffiths was a candidate for a companion should Bonnie Langford have left. However, she did not, so Griffiths' appearance was a one-off.
She shared her memories of Delta and the Bannermen on the documentary Holiday Camp.