Sorry if the description is a little open to interpretation, but what I wrote above is all the information that has been passed on to me. I wouldn't want to mislead anybody by speculating that his accent definitely sounds partially Indian as unfortunately it seems the info could be read either way- personally the way I read the description is that he has a softly spoken London accent but is of Indian appearance, but as you say it's possible that he has a mixed accent, so that may be something to look out for as well but, from the description, I wouldn't necessarily discount that he may have a typically London accent, or at least be able to disguise it as such.
I work for agencies so I don't handle the phonecalls (although all my agents are very alert to this guy's description too), therefore have been working entirely on the basis of looking out of the window to get a look at clients first, and only working from incall locations where this is possible- the physical description of him seems to have been verified by multiple girls so I'm guessing is very accurate. If I was working from home I would personally be sending them to a location where I could see them from the house first, before revealing the full address.
Again I stress, I've heard no reports of him attacking independent girls, only agency girls. But as agencies are circulating his details he may soon find it harder to book through agencies and I thought that this could put independents at danger if he decided to move on to them.
The info re names (Leon/Rulu) is already out of date as apparently he's used different names since, so they're probably not much help now.