Alex Mahon

The provided news articles focus on the UK's new regulations on junk food advertising, the BBC's search for a new director general to succeed Tim Davie, and the potential return of Mark Thompson to the BBC. Alex Mahon is not mentioned in any of these articles. Therefore, it is impossible to provide a summary about Alex Mahon based on the given information. The articles highlight the challenges the BBC faces in finding a suitable successor to Tim Davie, particularly in light of recent controversies and the high-profile nature of the role. The new advertising regulations are also a significant development, impacting the broadcasting landscape and advertising strategies.