Social and cultural changes in the post-war period led to an increasing number of British universities to become co-educational. In Cambridge, Churchill College, King's College and Clare College were the first men's colleges to admit women in 1972. Girton had already amended its statutes in 1971 in such a way as to allow the admission of men should the Governing Body vote in favour at an unspecified date in the future. The decision to become mixed came in November 1976, when the Governing Body voted to act upon the statute, which made Girton the first women's college to admit men. In January 1977, the first two male Fellows, Frank Wilkinson and John Marks, arrived, followed by male graduate students in 1978, and, finally, undergraduates in October 1979. One reason for the change was that the first mixed colleges in Cambridge immediately shot to the top of the Tripos league tables, as they seemed to attract bright students, who preferred to stay in co-educational colleges.