A fuel management system for a gas turbine engine, the fuel management system comprising: a fuel tank configured to store fuel for the gas turbine engine; a fuel supply line configured to supply fuel from the fuel tank to a combustor of the gas turbine engine; a reheat fuel supply line configured to supply fuel from the fuel tank to a reheat of the gas turbine engine, the reheat fuel supply line extending from a reheat branching point on the fuel supply line to the reheat; a fuel supply pump disposed along the fuel supply line upstream of the reheat branching point; a reheat pump disposed along the reheat fuel supply line, the reheat pump configured to pressurise fuel to a reheat delivery pressure for delivery to the reheat; and a reheat recirculation line configured to recirculate fuel from the reheat fuel supply line to the fuel tank, or to the fuel supply line upstream of the fuel supply pump, the reheat recirculation line extending from a reheat recirculation branching point on the reheat fuel supply line downstream of the reheat pump; characterised in that the fuel management system further comprises a reheat recirculation control system configured to: determine a reheat pump supply rate from the reheat pump; determine a reheat fuel demand rate required by the reheat; determine a required recirculation rate based upon the reheat pump supply rate and the reheat fuel demand rate; and recirculate fuel at the required recirculation rate via the reheat recirculation line to provide fuel to the reheat at the reheat fuel demand rate. a fuel tank configured to store fuel for the gas turbine engine; a fuel supply line configured to supply fuel from the fuel tank to a combustor of the gas turbine engine; a reheat fuel supply line configured to supply fuel from the fuel tank to a reheat of the gas turbine engine, the reheat fuel supply line extending from a reheat branching point on the fuel supply line to the reheat; a fuel supply pump disposed along the fuel supply line upstream of the reheat branching point; a reheat pump disposed along the reheat fuel supply line, the reheat pump configured to pressurise fuel to a reheat delivery pressure for delivery to the reheat; and a reheat recirculation line configured to recirculate fuel from the reheat fuel supply line to the fuel tank, or to the fuel supply line upstream of the fuel supply pump, the reheat recirculation line extending from a reheat recirculation branching point on the reheat fuel supply line downstream of the reheat pump; characterised in that the fuel management system further comprises a reheat recirculation control system configured to: determine a reheat pump supply rate from the reheat pump; determine a reheat fuel demand rate required by the reheat; determine a required recirculation rate based upon the reheat pump supply rate and the reheat fuel demand rate; and recirculate fuel at the required recirculation rate via the reheat recirculation line to provide fuel to the reheat at the reheat fuel demand rate. determine a reheat pump supply rate from the reheat pump; determine a reheat fuel demand rate required by the reheat; determine a required recirculation rate based upon the reheat pump supply rate and the reheat fuel demand rate; and recirculate fuel at the required recirculation rate via the reheat recirculation line to provide fuel to the reheat at the reheat fuel demand rate.