From an official's perspective, the thing you are potentially most mindful of is that if a requester isn't satisfied, there is a mechanism—they can go to the information commissioner—and there's a mechanism for resolving that, on a dispute basis. That's a world you don't want to be in.
When someone has made a request, you want to be able to answer the request, fulfill your obligation, and for that to be done. You want it off your desk, for the majority of things. Obviously there are things that are politically much more sensitive, and there could be some very different processes.