Neoliberal economics was endorsed by Conservative British Prime Minister Margaret Thatcher who adapted it as part of a free-market conservatism closer to the developments in American conservatism, while traditionalist conservatism became less influential within the British Conservative Party. However, the British Conservative Party still has a large traditional conservative base, particularly the conservative Cornerstone Group. Thatcher publicly supported centre-right politics and supported its spread in Eastern Europe after the end of the Marxist-Leninist regimes in the late 1980s and early 1990s. After the collapse of communism in Eastern Europe, a variety of centre-right political parties have emerged there, including many that support neoliberalism.