Debates over the Comprehensive system seemed about to become a major political issue, particularly with the election of a Conservative government in 1970. However many Tories were ambivalent on the issue. More grammar schools were closed under Margaret Thatcher than any other Education Secretary, but this was by now a local process, which was allowed to continue to avoid controversy. Her Circular 10/70 simply removed the compulsion of Circular 10/65, leaving it up to individual LEAs whether or not they would go comprehensive.