"Welcome to Damh the Bard's therapy session!" It's what I say when I'm getting towards the end of Wild Mountain Thyme live. It's meant as a bit of fun, to encourage those who might be reticent about singing along, to join in. It builds community. Brings people together. It's what music does, as seen at this weekend's Glastonbury festival. 100,000 people singing along with Adele and Coldplay, in harmony, smiling, and feeling connected with each other. It&#0