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Commissioning Better Outcomes Fund- Positive Families Partnership

Social Impact Bond

Location: London, United Kingdom

Launch date: 2018

Duration: 66 months

Capital raised: £4.5m

Policy area: Children’s social care

Government outcomes fund: Commissioning Better Outcomes Fund (Big Lottery Fund)

Commissioners: London Borough of Bexley (Local government), London Borough of Newham (Local government), Merton Council (Local government), Tower Hamlets Council (Local government), London Borough of Sutton (Local government), The National Lottery Community Fund

Providers: Family Psychology Mutual, Family Action, the South West London & St George’s Mental Health NHS Trust

Investors: Bridges Fund Management

Advisor: Social Finance

SIB structure: Managed

Delivery body: Positive Families Partnership

Target population: Vulnerable families

Size of cohort: 350

Outcome evaluation method: Validated administrative data

Stage: Implementation

Intervention description

Positive Families Partnership supports families facing significant difficulties by providing therapeutic programmes designed to help address a young person’s behavioural issues and improve family functioning. The programmes are intensive, holistic interventions, based on rigorous evidence. These are:

  • Multisystemic Therapy (MST) - an intensive, community based, evidence-based programme that addresses reasons for a young person’s serious antisocial behaviour and family difficulties that could lead to a young person being placed away from home.
  • Functional Family Therapy (FFT) - an evidence-based programme that works to improve interpersonal relationships within families. It seeks to improve communication and supportiveness between parents or guardians and young people, while decreasing hostility.


Outcome measure A: Successful completion of the selected intervention

Outcome metric: Young person accessing MST or FFT successfully completed the intervention. This is expected to be achieved 3-5 months after the start of the intervention delivery for that individual.

Outcome measure B: Young person remains at home with the family/ caregivers rather than entering care. 

Outcome metric: Quarterly measurement over two years post intervention of the number of weeks (7 consecutive days) spent at home by each individual, with a tariff payment for each day spent at home rather than in care. 

Further information