<P> In 1813, a House of Commons Committee recommended excluding foreign - grown corn until the price of domestically grown corn increased to 80 shillings (£ 4--equivalent to £ 240 in 2015) per quarter hundredweight (1 quarter = 28 lb or 13 kg). The political economist Thomas Malthus believed this to be a fair price, and that it would be dangerous for Britain to rely on imported corn because lower prices would reduce labourers' wages, and manufacturers would lose out due to the decrease of purchasing power of landlords and farmers . </P> <P> Nevertheless, the ceiling price of 80 shillings a quarter for domestic grain was so high that, between 1815 and 1848, it was never reached . David Ricardo, however, espoused free trade so that Britain could use its capital and population to its comparative advantage . With the advent of peace in 1814, corn prices decreased, and the Tory government of Lord Liverpool passed the 1815 Corn Law to keep bread prices high . This resulted in serious rioting in London . </P> <P> Soon afterwards, repercussions of the 10 April 1815 eruption of Mount Tambora in Indonesia, compounded by four preceding big eruptions, caused the 1816 Year Without a Summer and caused famine by disastrously reducing crop yields . Reduced standard of living and food shortages due to poor harvests led to riots . </P> <P> In 1820, the Merchants' Petition, written by Thomas Tooke, was presented to the House of Commons . The petition demanded free trade and an end to protective tariffs . The Prime Minister, Lord Liverpool, who (falsely) claimed to be in favour of free trade, blocked the petition . He argued, speciously, that complicated restrictions made it difficult to repeal protectionist laws . He added, though, that he believed Britain's economic dominance grew in spite of, not because of, the protectionist system . In 1821 the President of the Board of Trade, William Huskisson, composed a Commons Committee report which recommended a return to the "practically free" trade of the pre-1815 years . </P>

Explain the impacts of scrapping of the corn laws