Griffiths (pictured) joins from Guardian News and Media, where she was head of research. 

In her new role, she will be responsible for projects that will result in BARB delivering new services. These include: how the organisation works with return path data; coordinating contract tenders and overseeing implementation of the next phase of Project Dovetail. 

“Dealing with fragmentation is not a new issue for BARB and our strategy for future-proofing our services is both necessary and ambitious," said Justin Sampson, chief executive of BARB. 

"Delivering this while keeping an eye on the day-to-day is the catalyst for adding Rhiannon to our team. She will be a great asset.”