The Liberal Democrats (UK), also known as the Lib Dems or Liberals for short, are the third largest political party in the UK, Labour and Conservative being the larger two. The current leader of the Liberal Democrats is Nick Clegg, who came to power in December 2007 winning the Leadership contest by a tiny margin.
Policies after the 2010 General ElectionEdit
The Liberal Democrats are in coalition with the Conservative Party. This allegedly was because they felt they could influence the government more if they were part of it than if they let the Conservatives go into minority government, and because they would not have had a majority had they gone into coalition with the Labour Party. As part of the agreement the government cut the income tax threshold to £10k and there will be a referendum on the Alternative Vote. Despite this
some most people on the left feel they have sold out to the Conservatives and talk about Opportunism as the minimal sops to LibDem supporters haven't mitigated the policies of the most radically right-fringe government in modern British history. It's likely that most Conservatives will campaign against the alternative vote and the referendum may be lost. 
Today I’m disappointed that the British Liberal Democrat Party in coalition with the Conservatives has not done more to prevent spending cuts hurting poor people and I’m disappointed that the British Liberal Democrat Party in coalition with the Conservatives has not done more to prevent tax increases that hurt poor people disproportionately. User:Proxima Centauri
Some A very large amount of grassroots members of the Liberal Democrats are losing confidence in their leadership and at least one senior Cabinet minister, Vince Cable has serious doubts about the coalition. 
Quote from the BBC:-
Inevitably, there is a joke. A man rings up the Lib Dems for a copy of their manifesto. "We've sold out," comes the reply. "Yes, I know that," the man says. "I just want a manifesto." 
Party leader, Nick Clegg claimed he was an atheist but has been seen in church. 
The Liberal Democrats support social liberalism and a more Laissez-faire government expenditure, basically making more of a liberal party than Labour, but nowhere near as economically far right wing as the Conservatives.
They opposed the Iraq War from the outset.
The Lib Dems (as they are frequently called) quite often came up with good policies, it was then tradition for at least one of the bigger parties to steal it, and call it their own idea. The Lib Dems are big on the issue of the environment, and took that issue up long before it was cool to be green.
See Also: Political Spectrum
However, after Ed Miliband became leader of the Labour Party, the party has become more progressive, while the Lib Dems have chosen to ally themselves with the radical right wing Conservatives.
The LibDems currently have 57 seats in the House of Commons, from a high of 62 after the 2005 election, they lost seats in the 2010 election despite increasing their vote
London Mayoral Election, 2008Edit
For the London Mayoral Election of 2008, the Liberal Democratic candidate was Brian Paddick, former Deputy Assistant Commissioner for the London Metropolitan Police. Paddick came third behind Conservative Winner Boris Johnson and incumbent mayor Ken Livingstone of Labour.
- The emergency budget: Taking from the poor
- Lib Dems 'concern' over policies secretly recorded Not all high ranking Lib Dems agree with the coalition policy that Nick Clegg supports.
- Nick Clegg's rollercoaster year