Combined Authority and Combined County Authority Returning Officer guidance for Combined Authority Mayoral elections Share on Email Print this page Print full guidance You are in the Combined Authority and Combined County Authority Returning Officer guidance for Combined Authority Mayoral elections section Combined Authority and Combined County Authority Returning Officer guidance for Combined Authority Mayoral elections Data collection and feedback At scheduled elections, you will be asked to send information and data to us relating to the elections.All information needed to return data to Electoral Commission Post Election Data specification May 2025 Elections (XLSX) User guide for Post poll data collection May 2025 (DOCX) Sheet for LA to add up VIDEF data Link to data portal Last updated: 7 April 2025 Book traversal links for Data collection and feedback FOI requests Accounting for the election