Lister,
Norwich are responsible for all costs, therefore the CAA dictate that all responses are sent to Norwich for them to collate and forward to the authority.
The applicant is responsible for ensuring that all local airfields, operators, county/local & parish councils and any other interested parties are;
1. Sent a copy of the of the final applicaton documentwhich is to be submitted to the CAA/SAP (in this case some 50 or so pages) together with a response form asking for their comments/approvals/opposition (sent to 250 or so parties).
2. A month before the closing date, sent a reminder to those who haven't responded (the majority).
3. Two weeks before the closing date, ring everyone who hasn't responded (the majority) asking for their response (yes or no), if a message has to be left on voicemail, the applicant has to ring again until they talk to a human being, print their response and lodge it with the final documents.
Thereafter, every response is collated and sent to the CAA.
There are checks and balances in place, imposed and regulated by the CAA, to ensure that the applicant is behaving in an impartial manner with the appropriate penalties if it can be proved beyond doubt that they didn't.