“In a field where there are no legal rules but only conventions deduced from previous events, of which there are not many, and the views of learned writers, I consulted with constitutional lawyers in the persons of Sir David Williams, QC, Regius Professor of Law at the University of Cambridge, and Sir William Wade, QC, former Master of Gonville and Caius, Cambridge.”
The Times, 4th May 2010
Source: www.timesonline.co.uk