What drives me is a sense of urgency. We live in frightening times. Progress towards gender equality and vital battles to end discrimination on grounds such as race, age, sexuality and disability are stalling and in some places, reversing. This is happening because of the collapse of trust in nearly all public institutions, and in particular in politics and media, and the inescapable feeling that the current system isn't working for most people.

Writing a book is like running a marathon. You need to be fit to do it, mentally and, as far as possible, physically.

We are all impacted by the failings of a news media that almost always chooses which stories to cover according to the priorities and perspectives of white men with private educations.

Iceland's Women's Day Off in 1975 saw 90% of Icelandic women take time off from their paid and unpaid work, an experience that not only showed women how much they contribute but turned Icelandic men into supporters of gender equality. I aim to achieve the same impact in the UK.

It's not enough to vent about what you don't like on social media. I would ask everyone who can, men included, to get involved in an organisation actively working for gender equality.

It is, after all, absurd that in 2017 women are still at best second-class citizens.

As a young woman working in journalism, I assumed harassment and discrimination came with the territory and that you just had to get on with the job. As I rose to senior positions, it took me awhile to realise that just because I'd survived relatively unscathed didn't mean the younger women joining the profession would do so, and it isn't until you hit a certain age that the reality of ageism - which is much more acute for women - kicks in.