The SVR Website lists The Fasting Girl among items filmed on the SVR. SVR News does not mention the filming of this drama.
A BBC Wales TV drama broadcast in 1984[1], it was a dramatisation of newspaper reports from 1869 concerning a little Welsh girl who was claimed to have fasted, with no significant loss of health, for more than a year[2].
A brief extract is featured in an ABC TV trailer on YouTube, though with no obvious SVR connection.