Who can ask you for a written approval
The applicant (or someone acting on their behalf) can ask for your written approval on their application.
You need to understand why the applicant is asking for your approval, and how the activity in the application will affect you and your property.
How to know whether to give written approval
We can't give you advice on whether you should give your approval.
If you are unsure, you should get independent advice.
You can discuss the application with the applicant and suggest possible solutions to any concerns you may have.
The applicant may be willing to negotiate and change their proposal to reduce its impact on you. Make sure that any changes to the proposal, you have agreed on, are incorporated into the plans and application material that you sign.