LONDON (Reuters) - The leader of Britain s main opposition Labour Party, Jeremy Corbyn, and other politicians could lose their seats if proposals to  cut the cost of politics  go ahead, a report suggested on Tuesday. Under former prime minister David Cameron, the governing Conservative Party pledged to reduce the number of lawmakers from 650 to 600 to make cost savings after criticism of expense claims made by those working in parliament. The independent boundary commission has made proposals to make sure most electoral districts in England, Scotland, Wales and Northern Ireland are roughly equal in the number of voters, meaning certain seats, like Corbyn s, are set to be abolished. But it is not clear whether parliament will back the plan, which is not due to take effect until 2022.  Since losing the Conservatives  parliamentary majority at an election in June, Prime Minister Theresa May is dependent on the support of a small Northern Irish party, the Democratic Unionist Party, which has opposed any changes in earlier votes. Labour has also said it would vote against the measures, accusing the Conservatives of using the review to pursue  their own political advantage .  The Daily Telegraph newspaper said if the changes had been in place before the June election, May s Conservatives would have won a majority. 