A BEHIND the scenes look at the new mental health awareness advert featuring the Dukes and Duchesses of Cambridge and Sussex has been revealed. The Every Mind Matters video was praised by fans when it aired simultaneously across four channels on Monday night. William, Kate, Harry and Meghan narrate the clip which directs viewers to the Every Mind Matters website for tips on coping with life’s ups and downs. And today, on World Mental Health Day, viewers can see some extra outtakes that weren’t included in the three-minute film.It features celebrities including Gillian Anderson, Davina McCall, Glenn Close, Freddie Flintoff, Professor Green and Nadiya Hussain. The stars reveal their experiences with mental health and why they wanted to get involved in the campaign, which aims to tackle Britain’s poor mental health. Opening up Rapper Professor Green opens the clip, saying: “My mental health varies day to day – today’s quite good.” Actress Gillian Anderson continues: “Everybody struggles with varying degrees of anxiety and depression.”The advert was written by film director, Richard Curtis, who features in the behind the scenes clip. My mental health varies day to day – today’s quite goodProfessor Green He says: “I was asked to write a little film…