I've not read of anything in that area at all - nothing shown on Magic either. If there was anything there, it's long gone under the college I suspect.

Perhaps this may be of some use
http://cgi.ebay.co.uk/Prehistoric-London-Its-Mounds-and-Circles_W0QQitemZ190010384598QQihZ009QQcategoryZ98579QQrdZ1QQcmdZViewItem

I decided to visit the loft and dig out my copy of of Gordon's , p84 has a mention of Kensington but is merely about the upper garden at Kensington being known as the "siege of Troy".
Kennington getas a mention in relation to it's "sacred mound" but not much info. This is just a quick look via the index I'll have a proper butchers later .

'Ere - I dunno if this is within your remit:
http://www.kch42.dial.pipex.com/holywellslond.htm

I stumbled across it whilst researching some other wells - I had no idea there were so many "visitable" wells in London! Yay!

G x