Times have moved on a lot when it comes to mental health issues but there is still a stigma attached, which often prevents people talking openly about their feelings and from knowing when to seek help.
It is important to teach children from a young age how to recognise the positive and negative signs, and how to overcome any obstacles stopping them from getting the help they need. Often, just being able to talk about how you are feeling is the first step.
Dr Redfern and her colleague Dr Debbie Plant are delivering a new programme called Cues-Ed, funded by the South London and Maudsley Trust. The programme teaches children to recognise the signs when things aren't right, and some behavioural techniques to help them manage low mood. "We all have feelings," says Dr Redfern. "And we will all have difficulties in our lives which will make us feel and think things that are very challenging. "And rather than being fearful about talking about these things, we want children to have the language that allows them to get the right help and to say, 'Actually this is how I am feeling, these are the things I am thinking and I need some extra support.'"