Sister Julienne is rolling back the years thanks to new cast member Helena Wilson, who plays the younger version of Jenny Agutter's much-loved character

Call The Midwife: Sisters In Arms will be a prequel to the original BBC series, set in Poplar in September 1939 during the outbreak of the Second World War

A first look at Call The Midwife's new prequal series, Sisters In Arms, sees Julie Hesmondhalgh posing with a clapperboard as it's confirmed that filming has wrapped on the BBC…