I cannot think of any other time when so many commercial and BBC stations have united to broadcast a single co-ordinated message. The Mental Health Minute 2020 featured the voices of the Duke and Duchess of Cambridge, England captain Harry Kane, singer-songwriter Dua Lipa, actor David Tennant and heavyweight champion Anthony Joshua.  The initiative had begun in 2018. Overseen excellently by Radiocentre and Heads Together, the mental health campaign, it was aired on hundreds of stations to audiences of around 20m.   Hear here how 17 of the stations put their arm around 2020's timely campain.