Holy cobbles! Fiz Brown turns into a nun

With thanks to my Canadian pal tvor for alerting me to this picture.

Holy cobbles! Why on earth is Fiz Brown dressed as a nun? It's all to do with filming for the new Coronation Street DVD set in South Africa that'll be released later this year. But I'm jiggered if I understand the simple sum of Coronation Street + South Africa = Fiz Brown in a nun's habit. Are the hills alive with the sound of a malfunction in the costume department?