How to Access an American PhD Thesis?
You could use ProQuest for free at the British Library.

Obtaining theses in the Reading Rooms: North American theses
ProQuest Dissertations &amp; Theses is available online on the electronic
resources terminals in Humanities - Floors 1 and 2.

http://www.bl.uk/reshelp/findhelprestype/theses/hrrtheses/theses.html