Support for Britain's Liberal Democrats has plunged to half the level that they enjoyed in May's general election, after they formed a coalition with the Conservatives, a poll showed on Sunday. The Lib Dems were on just 12 percent of support, which marked a dramatic shift from the 24 percent that they won in the election, and was their worst level since October 2007, according to a YouGov poll for the Sunday Times. In another heavy blow, the survey also showed tumbling support for Lib Dem leader and Deputy Prime Minister Nick Clegg. Clegg's personal satisfaction rating had collapsed to just eight points, compared with 72 points at one stage during the election campaign, according to YouGov. However the poll also showed that Prime Minister David Cameron's Conservative Party had fared far better than his coalition partners and enjoyed 42 percent of support, up five points from its level at the election. At the same time, the opposition Labour Party saw its support gain eight points to 38 percent. YouGov interviewed 1,885 people online on Thursday and Friday for the poll. Labour was ousted from power at the May 6 general election after 13 years of running the country. Cameron and Clegg subsequently formed Britain's first coalition government since World War II when the Conservatives won most seats but failed to win an outright majority. 