Since the mid-1920s, the two main political parties in the UK have been the right-wing aristocratic/corporate Conservative Party and left-wing democratic socialist Labour Party. Before then, the Conservatives (Tories) vied for power with the Liberal Party (originally known as Whigs), the latter being nominally radical and progressive throughout the 18th and 19th centuries. The Liberal agenda and ideology has always been inconsistent however, sometimes reactionary. The Conservative Party currently govern in a coalition government with the deceitful, traitorous Liberal Democrats; we are suffering under their vicious "austerity" and authoritarianism, destroying the great institutions created by the post-war Labour government from 1945 to 1951. The Labour governments of Tony Blair and Gordon Brown were in power from 1997 to 2010. Many, such as myself, are strongly disillusionment with the Labour Party, due to its Orwellian draconianism and appeasement of corporate vested interests in these 13 years. So directly addressing your question, our political situation is slightly less one-dimensional to that in the United States.