We are guided by the 'Code of practice on workforce matters in local authority service contracts' (Annex D of the circular linked to below) involving the transfer of County Council staff, or County Council staff who were previously outsourced.
There are set procedures for projects involving the transfer of staff, including a pre-qualification questionnaire used for short listing prospective candidates to be invited to tender. These are held on the Department for Communities and Local Government website:
East Sussex County Council