RAWTENSTALL (Reuters) - The leader of Britains main opposition party urged Prime Minister Gordon Brown on Monday to call a general election, saying the political system was paralysed by a scandal over lawmakers expenses. Several days of disclosures in the Daily Telegraph about lawmakers expenses have led to anger among the public and criticism of parliament and its members. Conservative leader David Cameron called on voters of all the main parties to petition for a general election to be held after the June 4 local and European elections. He said only by dissolving parliament and holding a general election right away could the expenses mess be sorted out, as well as the recession and debt crisis that has seen the UK hit by rising unemployment and house repossessions. This political crisis has been caused by the politicians, so I dont think the politicians alone can solve it, he said during a speech to launch the partys European campaign in Rossendale, northwest England. The public have got to be involved. He said he was turning the campaign for the European elections into the one Britain now needs. And I want as many people as possible whether you support Labour, or the LibDems, or no party to join in. He urged people to write to newspapers and to start a petition. The government does not have to call a general election until June 2010. But Cameron said he did not think the country could wait another year. The political system in Britain today, from the Prime Minister downwards, is quite simply paralysed, he added. And it is now abundantly clear that the country does not want to wait another year to give all of us in Westminster a simple message: We want change: now get on with it. Experts said it was a good tactical move by Cameron to embarrass the government, but doubted it would lead to an early general election. He might get signatures obviously from Conservative activists and indeed from other people as well, and letters to the newspapers, but I dont think it will actually produce an outcome, said Wyn Grant, politics professor at Warwick University. Gordon Brown is hardly going to ask for a dissolution in what is a highly unfavourable time for him. Things cant get much worse for Labour and they might get a bit better. The optimum strategy for him is to hang on as long as possible.