BBC Call the Midwife star reveals extreme weather warning almost derailed Christmas special: 'Was all over the news'

This year’s festive episodes see the long-running BBC series travel far beyond Poplar, with a dramatic storyline taking several characters to Hong Kong after a landslide causes a mission building to collapse.

Speaking ahead of the Christmas special, Ms Agutter explained that the weather conditions added an unexpected level of tension to the shoot.

“One was apparently coming which was all over the news,” she said, recalling the typhoon warning issued while the cast were in the city.

“The winds became really bad on the Saturday night when we weren’t working, but we were told to be careful because it was going to get bad that night.”

The actress said the situation escalated in the early hours, with production taking precautions as the storm intensified.

“In the early hours of the morning, it really was stronger.

"On Sunday, the strongest winds were blowing. They said not to open the curtains of the hotel in case anything hit the window,” she explained.

Despite the warning, the actress admitted curiosity got the better of her.

“Of course, I had a jolly good look outside because it was rather amazing seeing all the water whipped up,” she said, adding that she even filmed a short clip for a colleague to show what it was like during the storm.

The Hong Kong episodes form part of a two-part Christmas special airing on BBC One and BBC iPlayer, with the storyline exploring themes of displacement, compassion and renewal.

Ms Agutter said the experience overseas had a profound impact on her character, Sister Julienne.

“There’s the excitement of being able to make a difference and the energy that creates in a place where you’re actually working with people that really need you,” she said.

“That stays with Sister Julienne when she returns to the UK.”

Other cast members also spoke about the challenging conditions, with Rebecca Gethings, who plays Sister Veronica, describing the heat and humidity as “extreme”.

“The first day I was drenched in sweat,” she said. “But you do acclimatise."

Linda Bassett, who portrays Nurse Phyllis Crane, admitted she had been anxious about the long-haul travel but said the experience was ultimately rewarding.

“We went to places you wouldn’t go as a tourist,” she said. “The people were lovely and the crew were smashing.”

Despite the difficult conditions, the cast stressed that the Christmas special remains packed with festive warmth and emotion.

Helen George, who plays Trixie Aylward, promised viewers both tears and joy.

“A Call the Midwife Christmas special wouldn’t be the same if one didn’t shed a tear,” she said.

“There will be moments of contemplation and reflection, swiftly followed by uplifting Christmas cheer.”

The episodes also feature a large Christmas parade in Poplar, angel costumes, and Fred Buckle once again donning his Santa suit.