In any appeals process, including an appeal conducted through written representations,
the inspector may make an official, accompanied visit to the site of the proposed development.
Although no new evidence can be presented at this stage, the visit can be an excellent opportunity to impress upon the inspector the points you made in your evidence.
To make the most of the site visit, decide in advance what you want the inspector to see and make any necessary arrangements for this.
You may want the inspector to talk to some local people if, for example, the proposed development would have an impact on their home.
The visit can constitute an important part of your case, and is a chance for the inspector to experience the depth of feeling at grassroots level, so prepare for it carefully.