The CIPD/Simplyhealth Health and Wellbeing at Work report also revealed that mental ill-health was now the main cause of long-term absence in more than a fifth of United Kingdom organisations (22 per cent) and that stress-related absence had increased over the a year ago in more than a third (37 per cent) of businesses.
The total number of referrals since 2014 was 1,305.
More than half (55%) of referrals over the four-year period came from primary schools.
Furthermore, 18 per cent of referrals for children were declined specialist CAMHS treatment in the region.
It says community and voluntary services such as Childline are picking up the pieces in many cases and the government must plough more cash into them.
"Radio is coming together in a United Kingdom first today to shine a light on the important issue of mental health".
She said even where referrals were accepted, waiting times were often lengthy.
The figures - which are the results of a Freedom of Information request to NHS trusts in England by children's charity the NSPCC - have been released today, the first day of Mental Health Awareness Week.
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Being in "a male-dominated" workplace was a key factor for 50 per cent of those who felt there was still a stigma, with a further 46 per cent highlighting fears over job security and career progression that made talking about mental health a taboo at work.
The NSPCC's Childline service has reported a 26% increase in the number of counselling sessions with children about mental health issues over the past four years, with some saying they only receive specialist support when they reach crisis point.
In 2017/18 there were 325 referrals made from county schools for young people in the 12-15 age bracket.
Chris O'Sullivan, head of workplace at the Mental Health Foundation, said: "During this year's Mental Health Awareness Week we're focusing on stress".
They included changing the way health and social care professionals react to stressors in patients, which included a "compassionate and trauma-informed response" and introducing "mental health literacy" as a compulsory part of teacher training.
However, three-quarters (77 per cent) of workers said the support of an effective manager helped with their management of stress and mental wellbeing.
Esther Rantzen, the Childline founder and president said: "We must make sure that Childline is adequately funded so it isn't left vulnerable and can be there for the children who have nowhere else to turn".
"The statistics suggest that stress looms large for the British workforce, which - as a country of employers - is something we need to address", said Oliver Shaw, chief executive at Cascade.