The cross section for 2p photoionisation in atomic sodium and for the associated (2p)(4s) satellite line have been calculated using a relaxed Hartree-Fock model. The symmetry parameters associated with the ¹P and ³P final ion-core multiplets have also been determined. They are shown to have different photon energy dependencies near threshold. The results have been compared with earlier unrelaxed Hartree-Fock calculations by Theodosiou and Fielder (1982) and with available experimental data. The results are sensitive to relaxation and the inclusion of this contribution yields good agreement with experiment.