I must begin with a few words about my predecessor in the Rouse Ball chair, Sir David Williams. David Williams has had a career of outstanding service to legal studies, to universities, in particular Cambridge, and to the wider public. After completing his studies, he became one of the formidable group at the University of Nottingham's Law Faculty. He went on to Oxford—he has told me that he went there as a missionary—and during his time there produced his pathbreaking books on official secrets and public order, Not in the Public Interest and Keeping the Peace. He was, it must be said, not the only Cambridge public lawyer-missionary in Oxford. Sir William Wade was also there. By 1967 it appears that two missionaries were no longer required, and David Williams returned to Cambridge. In 1982 he succeeded Wade—by now also back in Cambridge—as Rouse Ball Professor. He has been an important presence in the world of administrative law and his contribution to environmental issues has been enormous. We are delighted that now he has laid down the burdens of office as Vice-Chancellor he has returned to the Faculty— albeit to a different chair.