John Major was born on 29th March 1943, the son of Tom Ball, known as Tom Major, and Gwen Major. Following Margaret Thatcher, John Major became UK Prime Minister. The label of ‘Tory sleaze’ stuck and lost John Major’s government further credibility. The economy picked up after leaving the Exchange Rate Mechanism, and, under John Major, the beginning of Britain’s longest period of continuous economic growth began. Sir John Major Biography and Profile.