With tours cancelled and rehearsal rooms closed, what's the future for dance? Ballerina Lauren Cuthbertson, psychologist Terry Hyde and choreographer Alexander Whitley assess the Covid-19 damage Lauren Cuthbertson was on her way home after performing in St Petersburg when an email brought her life to a screeching halt. "I was on the Gatwick Express and I got the email saying there'll be no classes and no rehearsals,"…