A Holiday Request Form must be completed and authorised prior to taking holiday leave (and not in retrospect) and therefore holidays should not be booked until this form has been authorised and processed for recording to personnel files. You must allow twice as long as the amount of leave you want to take, plus one day before requesting annual leave. E.g. you would provide 3 days’ notice for 1 day’s leave or 11 days’ notice for 10 days’ leave.