it's estimated that one in four adults experience mental health issues each year in the uk, and that 75% of mental illnesses start before a child reaches their 18th birthday. treatment, though, can be slow. at present, only 20% of children and young people who have significant mental health problems that would benefit from intervention are actually receiving the sort of standard services that we recognise. we really need to think about how we can reach that additional 80%. some of that needs to come through a greater expansion of conventional mental health services but i think we also need to look to new technology to help us.