Insight uses the DfE's definition of 'disadvantaged'. While the DfE count FSM6, LAC and adopted; The Ofsted handbook definition currently also includes SEND and children in care. The Ofsted produced school Inspection Data Summary Report (IDSR) uses the DfE definition, however. Insight uses the DfE definition for these reasons.
The Disadvantaged status of a pupil can be either explicitly set, or automatically inferred from other profile information.