Who married Eric Lubbock, 4th Baron Avebury?

Eric Reginald Lubbock, 4th Baron Avebury (29 September 1928 – 14 February 2016), was an English politician and human rights campaigner. He served as the Liberal Member of Parliament for Orpington from 1962 to 1970. He then served in the House of Lords, having inherited the title of Baron Avebury in 1971, until his death. In 1999, when most hereditary peers were removed from the House of Lords, he was elected by his fellow Liberal Democrats to remain. When he died, he was the longest serving Liberal Democrat peer.