The Hamlyn Lectures, presented annually at the School of Law of the University of Exeter since 1949, have been digitized and are available on the school's website. The page is not perfectly clear: you have to scroll to the bottom to find the the table that lists the lectures chronologically, with links to the PDFs. All of the lectures from 1949 to 2004 have been digitized.
The Hamlyn Lecture Series was established in 1949 by the Hamlyn Trust, whose primary goal is to make law more comprehensible to ordinary citizens. The public lectures have been delivered annually by distinguished judges, practitioners, academics and other eminent speakers. From 2005 the lectures have been supplemented by an annual “Hamlyn Seminar” to promote the launch of the lectures around the time of their publication.