Nearly half (44%) of young people who were bullied at school say it impacted on their mental health and that they experienced issues such as anxiety, depression, self-harm and suicidal thoughts, according to a new survey.

The findings are being released by Anti-Bullying Alliance, hosted by National Children's Bureau, with support from YoungMinds to mark the start of Anti-Bullying Week in partnership with Barclays (16-20 November 2015).

Over half (57%) of the 16-25 year olds who said they were bullied reported that this changed their behaviour and the way they felt, such as feeling angry or withdrawn; and just under half (43%) said they experienced body image anxieties. While a third (34%) avoided school or college as a way of coping with bullying.

Many of the young people polled said the effects of bullying have continued to cast a shadow over their lives after leaving school. Nearly half (46%) said that being bullied has had a long lasting effect on their self-esteem and confidence since leaving school and almost 37% of those bullied said it had had a negative effect on their ability to form personal relationships.

40% of those young people who were bullied said access to a supportive teacher trained in dealing with bullying would have made a difference. Yet, 70% of the 170 teachers surveyed said there was inadequate support for schools working with children with mental health issues and over half would value better training. 57% of teachers said in-school counsellors would help schools better support these vulnerable children.

In a separate survey conducted with the Royal College of General Practitioners, 92% of the 126 family doctors surveyed said they have had no formal training, resources or information to help them support children and young people with symptoms that relate to bullying. They confirmed that bullying has long lasting effects with 92% of GPs having seen adults with symptoms relating to childhood bullying.

A young person told us: "When I began high school, I got verbally abused every day and was even beaten up in school. It did lead to me developing severe mental health issues at the time, I was afraid of going to school, so had to move. It was a dark and scary time."

Lauren Seager-Smith, National Coordinator of the Anti-Bullying Alliance said:

'Bullying is a public health issue. We all need to play our part to stop bullying wherever and whenever it happens - whether it's in school, the community or online - but it's vital that we also invest in support for children and families impacted by bullying. We would like to see more training for teachers and health professionals, in school counselling, and much needed funds for Child and Adolescent Mental Health Services.'

Sarah Brennan, CEO of YoungMinds said:

'We tend to think of bullying as a series of throwaway incidents in a child's Life but this survey shows how devastating and life-changing the experience of bullying can be. If it isn't dealt with effectively it can lead to years of pain and suffering that go on long into adulthood. We need to skill up teachers, parents and GPs to be able to respond to victims in ways that make them feel listened to, taken seriously and cared for. With the advent of social media bullying doesn't stop when school ends it continues 24 hours a day, so we need to fully support young people both on and off-line to deal with the consequences and to enable them to recover and flourish.'

Ashok Vaswani, CEO of Personal and Corporate Banking at Barclays said:

'No child should suffer bullying in silence and as an official sponsor of Anti-Bullying Week we are proud to help give a voice to this incredibly important issue.'

Dr Liz England, Clinical Champion for Mental Health for the Royal College of GPs, said:

"Bullying - and increasingly cyber-bullying - can lead to very serious mental health problems in our young patients, which are often not talked about and go unnoticed.

GPs have a very difficult job in identifying mental health issues in young patients as they are often not the primary reason someone has for visiting their GP, and because of the stigma that unfortunately exists around discussing mental health problems.

It is important that our young patients know that GPs are highly trained to deal with physical and mental health problems - and to have sensitive, non-judgemental conversations with patients about any health issue."