I agree that it wouldn't be major, but I can imagine that it would be a right PITA and a lot of hard work and time to get something sorted and agreed, and probably not worth it as not having it wouldn't be a reason for refusal.
Might be tricky to solve the Lancing College access as really that would involve a new road in the South Downs National Park, although I don't think the access issue can be a reason to refuse this application.