Suggest you try for Kenneth Hudson through: The Museums Association,
34 Bloomsbury Way, London WC1A 2SF, U.K...Mark Taylor, Director.  Sorry
I don't have a number for them. You also might try Patrick Boylan,
Professor, City U., Dept. of Arts Policy and Mgt., Barbican Center,
Frobisher Crescent, Level 12. London EC2Y. His phone is 071-628-5641.
His FAX: 071-477-8887. He has been pres. of the Museums Assoc. and knows
all the museum people in the U.K.  Hudson's publishers are usually
either Cambridge U. Press or Butterworth's. Good luck!