Sandy,
The Royal College of Art, London offers courses in Visual Arts
Administration, History of Design and Conservation which might interest you.
These particular corses are run in Conjunction with the Victoria and Albert
Museum.They offer MA (taught), and MPhil and PhD research degrees, full and
part time.
See www.rca.ac.uk/
This is a surprisingly lacklustre site for such a switched-on place, but the
yearly prospectus is very well worth reading.
The RCA is a totally postgraduate college, which gives its research areas a
unique atmosphere. Also, its multi-disciplinary approach is very invigorating.
Best of luck!
Nick