Battleground marginal constituencies The killing fields are the 194 marginal seats with majorities of 10% or less that require a swing of 5% for the incumbent to lose. The Conservatives need a uniform swing of 2% in order to win the 326 seats required for an overall majority in the 650-seat parliament --------------------------------------------------------------- Marginals at risk (by party) Map shows distribution of seats at 2010 election Conservative 82 Labour 79 Liberal Democrat 27 Scottish National 3 Plaid Cymru 2 Green 1 Labour seats at risk (swing to lose seat) 1 Hampstead and Kilburn 0.08% Glenda Jackson (right), who won with just 42 votes in 2010, is standing down. Conservative Simon Marcus hopes to take seat 2 Bolton West 0.1% 3 Southampton Itchen 0.2% John Denham, who won by 192 votes in 2010, is standing down 4 Wirral South 0.7% 5 Derby North 0.7% Just 613 votes separated Labour’s Chris Williamson from Tories in 2010 – with Lib Dems a close third 6 Great Grimsby 1.1% Labour’s outspoken Austin Mitchell is stepping down. Battle for votes is between Labour and UKIP 7 Morley and Outwood 1.1% Tory Andrea Jenkyns is campaigning against Shadow Chancellor Ed Balls’ 1,101 majority 8 Telford 1.2% 9 Walsall North 1.4% 10 Birmingham Edgbaston 1.5% Lib Dem seats at risk 11 Solihull Lorely Burt’s 0.32% 175-vote majority faces strong threat from Tories 12 Dorset Mid and Poole North Tories look well placed to topple Annette Brooke’s slender 269-vote majority Conservative seats at risk (swing to lose seat) 13 Warwickshire North Held by Dan Byles with 54 votes in 2010 14 Camborne and Redruth 15 Thurrock Three-way marginal with Jackie Doyle-Price’s 2010 majority of 92 under threat from Labour and UKIP 16 Hendon 0.23% 17 Cardiff North 0.41% 18 Sherwood 0.44% 19 Stockton South 0.66% 20 Broxtowe 0.74% 21 Lancaster 0.78% and Fleetwood 22 Thanet South 16.6% Opinion polls put Nigel Farage (above) 12% ahead of Tory Craig MacKinlay in this UKIP target CON Current seats: 302 Extra seats needed for majority 24 LAB Current seats: 256 Extra seats needed for majority 70 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 -------------------------------------------------------------- Sources: Rallings and Thrasher, Election 2010; Electoral Calculus Pictures: Associated Press, Getty Images, Facebook words 379