Call The Midwife fans, rejoice – production has just started on the much-loved BBC show’s 13th season.

After season 12 came to a dramatic and moving end in the spring, with Helen George’s Nurse Trixie finally marrying her partner Matthew (Olly Rix) in a ceremony attended by all her Nonnatus House colleagues, the next series will see the start of a new pupil midwife training scheme, and that means a handful of new characters will be arriving on the scene.

A first-look image shared by the BBC gave us a first look at two new midwives, Joyce Highland (played by Renee Bailey) and Rosalind Clifford (Natalie Quarry), while another teaser photo showed a smiling Trixie alongside the nuns.

According to series creator Heidi Thomas, the new season will be set in 1969, and “we will see change and challenge rock the world of our beloved nuns, nurses, medics and midwives”.

Here’s what we know so far.

Call The Midwife season 13: meet the latest characters to arrive at Nonnatus House