Not quite sure if this is what you want but a very quick search through TMA brings up this about St. Catherine's Hill just outside Winchester... http://www.themodernantiquarian.com/site/3392#folklore
Plenty of Arthurian legends of course!
The Hants web site wasn't too helpful so a trip to the Local Studies section of the Winchester Library might be useful.
P.S. Are you the Alex G I know here in Winchester?

I don't want to teach you how to suck eggs - I'm sure you've got 'Hampshire Barrows' and 'Folklore of Prehistoric Sites in Britain' by Leslie Grinsell? What is your MA in overall?