Imagine being woken up in the middle of the night by a phone call from your frantic 18-year-old son, threatening to take his own life. Miles away from home in a university hall of residence, where he has struggled to find his feet and is suffering desperately from crippling anxiety, your previously happy, bright, high achieving boy is audibly cracking at the seams. And there is nothing you can do but try to calm him down.

“Tom felt he just didn’t fit in at university,” says Anna of her 24-year-old son, who became deeply unhappy and isolated during his three years as a neuroscience undergraduate at Bristol.