This guidance by Somerset Safeguarding Children Board is for professionals working with children and families to provide Early Help and targeted and specialist support. It outlines thresholds for assessments and services in order to assit professional judgement around the provision of effective support. Parental imprisonment is included in the guidance as a potential indicator for need of Level 2 (Additional), Level 3 (Complex) and Level 4 (Acute) support. Level 2 support might include an Early Help Assessment for brief interventions to 'reduce the impact (of parental imprisonment) on the child or young person'.
See Somerset's effective support guidance for an example of Local Authority policy/practice recognising/responding to the needs of children of offenders below: