Short answers, pulled from the story.
Harold Wilson served as Prime Minister twice: from 1964 to 1970 and again from 1974 to 1976. He is the only Labour leader to have formed governments following four separate general elections.
Wilson resigned on the 16th of March 1976, stating he had always planned to leave at 60 and was physically and mentally exhausted. His doctor had detected what would later be diagnosed as colon cancer, and by 1976 Wilson may already have been in the early stages of Alzheimer's disease.
The Wilson government abolished capital punishment under the Murder (Abolition of Death Penalty) Act 1965, partially decriminalised male homosexuality via the Sexual Offences Act 1967, legalised abortion through the Abortion Act 1967, abolished theatre censorship under the Theatres Act 1968, and liberalised divorce law with the Divorce Reform Act 1969. The Race Relations Act 1965 was the first British legislation to address racial discrimination.
The referendum on British membership of the European Community was held on the 5th of June 1975. The electorate voted by a near two-to-one majority to remain in the EC, the first referendum of its kind in British constitutional history.
Wilson studied at Jesus College, Oxford, from 1934, graduating in philosophy, politics and economics with what his examiners described as an outstanding first class Bachelor of Arts degree, with alphas on every paper. His politics tutor R. B. McCallum considered Wilson the best student he had ever taught, and biographer Roy Jenkins placed his academic results in the company of Peel, Gladstone, and Asquith.
The Lavender List was the name given to Wilson's Resignation Honours list in 1976, so called after the suggestion that the first draft had been written by his political secretary Marcia Williams on lavender notepaper. Roy Jenkins described the list as disfigured by peerages and knighthoods given to adventurous business gentlemen, and the episode caused lasting damage to Wilson's reputation.