Harlow is crap for resident hookers. Best I've seen are https://www.adultwork.com/2601221
- although to be fair, both are actually in Epping rather than Harlow, and Jenny actually lives in London and tours hotels in different area's, including Harlow (Epping).
I've seen a few other girls in Harlow before (most not on AW anymore) and they were all pretty crap. You get quite a few travelling troupes passing through that either visit the Park Inn in Harlow or the Bell Hotel in Epping. You can usually spot these ones easily as invariably they have zero AW feedback and often have very similar names and pictures.
As others have said, you need to look further afield really. It's a shame as if a good provider set up camp in Harlow that was reasonably priced, provided good service and availability, and was of course easy on the eye, she could make a killing. Sadly the ones that have tried have mostly been a bit crap