by the "Back to Nature" garden, was built on the Sandringham Estate in 2021. In May 2019, as a part of their "Heads Together" initiative, Catherine together with her husband and in-laws, launched Shout, a text messaging service for those who have mental issues. As of November 2020, the programme has facilitated over half a million conversations. In October 2019, Catherine, together with other members of the royal family, voiced a PSA video for Public Health England "as part of its Every Mind Matters program". In late March 2020, Catherine and her husband started supporting a new mental health initiative by the Public Health England amidst the COVID-19 pandemic in the United Kingdom. In April 2020, Catherine and her husband announced Our Frontline, an initiative providing mental health support to emergency medical workers. In May 2020, the couple's recorded radio message for Mental Health Awareness Week was broadcast across all the stations in the UK. In June 2020, Catherine hosted an assembly to 80 elementary school students across the UK where she discussed the importance of self-care and "opening up about your feelings". She led the assembly over a Zoom call and the assembly will be broadcast to more students who use Oak National Academy, an online education resource hub. In October 2020, she visited the University of Derby to learn about its support for students' mental health during the pandemic. In February 2021, Catherine recorded a video message about the importance of positive mental health during the pandemic. She encouraged children and parents to share their thoughts and feelings. She also highlighted the need for parents and carers to look after their own mental wellbeing. The video has been watched by over 3.5 million people. In May 2021, William and Catherine, with other prominent personalities, voiced 2021 Mental Health Minute, a one-minute record delivered by Radiocentre and Somethin' Else to mark 2021 Mental Health Awareness Week. The record was broadcast across all radio stations in the UK and reached over 20 million listeners. In the same week, Catherine posted a video on her YouTube channel with a message that there was "no shame" in talking about mental health as she chatted to a student about how the pandemic affecting young people. To commemorate World Mental Health Day on 11 October, William and Catherine posted a message on Instagram, sharing several organisations that support those who are struggling with mental