Lockdown is easing now as worries about physical ill-health recede. But could the stress and anxiety of the last few months lead to a second wave of the epidemic - one centred on the nation's mental health? File on 4 investigates the impact coronavirus has had on those already diagnosed with serious mental illness, and others for whom depression and anxiety are entirely new experiences. The programme looks at provision of mental health services during the crisis, hearing stories of early release from mental health wards and of sudden shifts in how help is provided. Reporter Claire Bolderson examines this quiet revolution in mental health provision prompted by Covid-19 and asks whether the changes are here to stay - and whether services, which many say are already stretched to breaking point, will be able to cope.