Appeals - Notification to objectors of an appeal being lodged - Public forum - Planning Advisory Service (PAS)

We are about to have an Appeal lodged for a complex application that will end up being a Public Inquiry.

We had over 1,400 objections to the planning application and wondered if anyone had any advice on what we are statutorily required to do, as opposed to what we have been doing by custom and practice, as the last thing I want to do is tie up staff resources sending letters and emails out to 1400+ residents!

Would site and press notices do?