2010 General Election: new constituencies; seats and swing

The 2010 General Election will use new constituency boundaries in England, Wales and Northern Ireland. In Scotland the boundaries will be the same as 2005. After the election there will be 650 seats in the House of Commons, four more than the 646 now. In partisan terms, the new areas give a net benefit to the Conservatives. If the 2005 election had been fought on the new boundaries the Conservatives would have gained around 12 additional seats and Labour seven fewer.