We have published a non-date specific timetable for local government elections and by-elections containing the statutory deadlines as set out in the election rules, which can be used to assist you in your planning.
You should ensure that you have contingency arrangements in place to enable you to respond and deliver a well-run election should a by-election arise. Once an election has been called you will need to review your plans and develop arrangements for the specific context and timetable of the poll.
Although they are ERO functions, for more information on the Voter Authority Certificate and Anonymous Elector's Document application deadline see our ERO guidance.