through the Child Support Agency/Child Maintenance Service
through the court for a "top-up" payment if the absent parent's income is in excess of £156,000 per year
There is a new gross income formula which is currently being introduced by the Child Maintenance Service where the absent parent is assessed to pay a percentage of their gross income (rather than their net income as was previously the case.)
For more advice contact Tina Coward on 01722 410664.