Selective mutism is most arresting described as a “phobia of speaking”. It is an anxiety dysfunction that impacts hundreds of childhood. Most standard estimates counsel one in 150 childhood in the UK have selective mutism. This falls to one in 1,000 with adolescents and one in 2,400 young adults. Nonetheless the proportion of older adults with the situation is unknown. Victoria Derbyshire reporter, Ashley John-Baptiste, went to meet other folks with selective mutism.