According to Deadline, the industry website, some presenters have taken this as a signal to relax the dress code and ditch smart attire.
Changes have already become evident on the main news bulletins since the BBC moved to a new studio set-up.
Tomasz Schafernaker has presented the weather in a jacket and T-shirt, while Mark Easton, the BBC’s home affairs editor, has paired his suit with a pair of trainers.
BBC foreign correspondents, such as Jeremy Bowen and Lyse Douset, do not wear “fine dinner party” attire when reporting from war zones.
On the main BBC One bulletins, Clive Myrie has been anchoring programmes from Ukraine over the past year in addition to hosting from the London studio.
During one report from Kyiv, he changed from an overcoat and scarf to a flak jacket after sirens began blaring.
Nielsen, whose salary is £180,000-£184,999, joined the BBC in 2019. She previously worked in the US and her native Denmark and was a visiting scholar at Stanford University, studying “what legacy media should learn and fear from the tech industry”.
She told staff that BBC News should film more reports on smartphones in an effort to engage the TikTok generation.
To illustrate the generational divide, she is said to have explained that her mother enjoys studio presentation but her children prefer the immediacy of reporting from the field.
Developing the BBC News TikTok account is one of the corporation’s main priorities for 2023.
The BBC News channel is due to relaunch on April 3. It will feature presenters standing in front of giant iPads to explain how news footage is verified.
As part of the merger, a number of veteran journalists have either chosen to quit or have been told that their services are no longer required.
Those exiting the channel include Joanne Gosling, Ben Brown and Martine Croxall. The five presenters who successfully passed the audition process and will be the faces of the channel are Matthew Amroliwala, Christian Fraser, Yalda Hakim, Lucy Hockings and Maryam Moshiri.
The channel will also have eight journalists who will serve as both correspondents and studio presenters.
A BBC source said: “Naja was making a general point about authenticity. She was not telling anyone what or what not to wear.”