'The reason high-profile people aren't saying anything is because they lose work, you're seen as you might be a trouble-causer,' says Beaumont.Photograph: Handout

When the comedian Lucy Beaumont revealed she had intervened to support a junior TV worker concerned about David Walliams' behaviour, she feared it would brand her as a troublemaker and ensure she would never work in television again.

The immediate response to her actions, however, has been more heartening. Her book Drinking Custard: The Diary of a Confused Mum sold out online soon after she talked about her fears for her career. There was also a flurry of online posts from fans buying tickets to her current tour, with many posting messages of praise and support.