Where would the wealthy live in Victorian London, and...

Depends which bit of the Victorian era you're writing about, but the interesting part about the time was that you could have pockets of prosperity right up against slums, so for example Oscar Wilde's son Vivian Holland recalled that in the 1890s when his family was living in Tite Street, Chelsea, their house backed on to a slummy street called Paradise Row and he was really scared of it. In the East End, which is where your Ratcliff Highway was, you would have found some fairly well-to-do people at Bethnal Green and in Hackney, especially if they were descendants of the Huguenots (French refugees) who had made good in the textile trade at Spital Fields. You can still see their houses to this day. A map of Victorian London will show you where these places were in relation to one another. On the other side of town was Kensington, always a good spot to locate your richies- remember though that Bayswater (on the "wrong side of the park") was also inhabited by rich people, but these were people who had made their money through trade instead of inheriting it and not so socially desirable!

Charles Booth did a Poverty Map which, of course, also shows where the wealthy lived. It is interesting to see in what close proximity the wealthy lived to the very poor. Of course, one has to take into account that there were no motor vehicles, and that the poor were limited to walking or using an omnibus.
Booth's map, along with a modern map for comparison, can be found at
http://booth.lse.ac.uk/cgi-bin/do.pl?sub=view_booth_and_barth&args=53100...

Be careful though - Booth's map is for the later Victorian period. Since the Victorian period stretches for 80-odd years and it was a time of transition in London you need to narrow this question down to a year. For example, with the railways and the establishment of bus (omnibus) routes came the opportunity to move out of the central city and into the suburbs. The rising middle class (some of them very wealthy, but considered "new money" and hence not accepted by Society) moved to the newly established suburbs where they could build a larger, more imposing home. Remember that AT THE TIME Londoners felt about these areas much the way we do about new, up-market housing estates. The genuinely wealthy would never condescent to live there, and the poor would laugh at the residents for "giving themselves airs" (while, most likely, envying them).