The government is still developing its understanding of the
  complex challenges involved in supporting vulnerable adolescents.
  Gaps in knowledge and the lack of a strategic approach mean that
  government cannot yet say whether its plans to spend a further
  £2bn will address the needs of families, vulnerable adolescents
  and children in the most effective way, according to the National
  Audit Office (NAO).
  There are around 7.3 million adolescents aged 9-19 years in
  England. Vulnerable adolescents are at greater risk of
  experiencing harm. If these adolescents do not receive effective
  support, from whatever source, at the right time, their problems
  may become entrenched and require intense and expensive support
  to reverse or mitigate any harm. The Independent Review of
  Children’s Social Care in 2021 has estimated that the annual
  social cost of not addressing the needs of all children who have
  ever needed a social worker is around £23 billion.
  For the individual, harmful consequences could include mental
  health difficulties, periods not being in education, employment
  or training, or contact with the criminal justice system. The
  different outcomes often overlap, for example around 72% of
  children sentenced in 2019-20 were assessed as having mental
  health concerns, with 71% having communication concerns. There is
  also variation across the country and by ethnicity.
  Support for vulnerable adolescents is provided largely by local
  bodies. Within central government, the Department for Education
  (DfE) is responsible for policy for children’s services and
  education, working with six other departments on its objective to
  support the most disadvantaged and vulnerable children and young
  people so no one is left behind.1 The NAO has
  calculated that the 2021 Spending Review announced plans to spend
  around £2 billion on a range of additional initiatives which
  include support for families, vulnerable adolescents and
  children.2
  Central government has a limited understanding of how different
  risk factors and characteristics combine to cause vulnerability.
  Available data shows a mixed picture. Referrals of children to
  secondary mental health services increased by 142% between
  2016-17 and 2021-22. The number of children cautioned or
  sentenced in the criminal justice system fell by 82% (from 85,300
  to 15,751) between 2010-11 and 2020-21. Government does not have
  the information to fully understand what is driving this change.
  Central government has a limited knowledge of whether the same
  adolescents are known to or receiving support from different
  local services, but has started to try to join up different data
  sets.
  The NAO found that, while departments work together on programmes
  and initiatives, there is no overall strategic assessment of
  whether vulnerable adolescents’ needs are being addressed.
  Without a strategic approach to planning, there is a risk of gaps
  in the provision of support, or that support from different
  programmes may overlap.
  At local level, there is more to do to improve the effectiveness
  of new arrangements aimed at joining up the work of local bodies
  involved in safeguarding children and providing support services.
  It can be difficult for local bodies to navigate the range of
  different government programmes, which can lead to confusion at
  the local level. 
  There is no joined-up assessment of the extent to which
  cumulative government interventions have succeeded in improving
  outcomes for vulnerable adolescents, and there are gaps in the
  evidence base of what works well to support adolescents. There is
  some evidence to show what works to prevent youth offending, but
  less on how to prevent other adverse outcomes, such as how best
  to support those at risk of being taken into care.
  The NAO recommends that government should build on recent data
  sharing exercises to improve its understanding of risk factors
  and adverse outcomes, and should address the gaps in the evidence
  base of what works well to support vulnerable adolescents.
  “Providing the right support to young people at risk of poor
  outcomes is vital to prevent both harm to individuals, and
  considerable costs to society, yet gaps in evidence and data mean
  the Government does not have the understanding it needs of this
  challenge. Without looking again at its approach, government may
  not make the best use of the funding it has to improve the
  chances of these vulnerable young people.”
  , the head of the NAO
  Full report: Support for vulnerable
  adolescents
  Notes for editors
  - The six other departments with policies and programmes that
  support vulnerable adolescents are The Department for Levelling
  Up, Housing and Communities (DLUHC), The Department for Health
  and Social Care (DHSC), the Home Office (HO), The Ministry of
  Justice (MoJ), Department for Work and Pensions (DWP), and the
  Department for Digital, Culture Media and Sport (DCMS).
  
 
  - The NAO calculates that the 2021 Spending Review announced £2
  billion of additional spending which includes initiatives to help
  prevent the avoidable costs of adverse outcomes for families,
  vulnerable adolescents and children. There
  are other existing programmes which provide additional prevention
  and support services to vulnerable adolescents such as: Violence
  Reduction Units (£170 million over four years 2019/20 to 2022/23)
  and the Youth Endowment Fund (£200 million since 2019 over 10
  years).