This looks OK to me, however if there are no pages which use the multiple version, do we need the added complexity that it brings? (I seem to recall that I asked this previously, so I guess we decided to keep it)

The /review pages require fetching information for multiple entities. Since, these pages make a number of requests to the web-service presently, the fetch_multiple_* functions are added to fetch multiple entities in less time.

Right, I had a memory that this was the case, no problem

One thing: There's no need to mention CB-231 since it's not directly related to this change.