FACTBOX-The British election - 40 seats to watch

LONDON, Dec 5 (Reuters) - The United Kingdom holds a national election on Dec. 12. Here are the main results to watch. Polls close at 2200 GMT. Early results could come on Thursday, but most are expected between 0200-0500 GMT on Friday. For more details on how the vote works, click here 1. FIVE EARLY RESULTS Constituency Held Maj Maj % Estimated ETA by Leave (GMT) vote in 2016 Newcastle upon Lab 14937 40.3% 48% 2300 Tyne Central Houghton and Lab 12341 29.8% 62% 2300 Sunderland South Newcastle upon Lab 19261 46.3% 41% 0000 Tyne East Newcastle upon Lab 10349 21.4% 57% 0000 Tyne North Sunderland Central Lab 9997 22.2% 60% 0000 2. FIVE SMALL CONSERVATIVE MAJORITIES IN 2017 Constituency Held by Maj Maj % Estimated ETA (GMT) Leave vote in 2016 Southampton, Con 31 0.07% 60% 0500 Itchen Richmond Park Con 45 0.07% 28% 0600 Stirling Con 148 0.30% 32% 0300 St Ives Con 312 0.61% 55% 0800 Preseli Con 314 0.74% 56% 0430 Pembrokeshire 3. FIVE SMALL LABOUR MAJORITIES IN 2017 Constituency Held Maj Maj % Estimated ETA by Leave (GMT) vote in 2016 Kensington Lab 20 0.05% 31% 0430 Dudley North Lab 22 0.06% 71% 0500 Newcastle-under-Lyme Lab 30 0.07% 62% 0300 Crewe and Nantwich Lab 48 0.09% 59% 0400 Canterbury Lab 187 0.33% 45% 0400 4. FIVE CONSERVATIVE REMAIN-VOTING SEATS Constituency Held Majority Majority Estimated ETA by % Leave vote (GMT) in 2016 Putney Con 1554 3.3% 27% 0200 Chelsea and Con 8188 19.4% 29% 0300 Fulham Cities of Con 3148 8.1% 29% 0300 London and Westminster Wimbledon Con 5622 10.9% 29% 0300 Finchley and Con 1657 3.2% 31% 0530 Golders Green 5. FIVE LABOUR LEAVE-VOTING SEATS Constituency Held by Majority Majority Estimated ETA % Leave (GMT) vote in 2016 Barnsley Lab 13283 32.5% 71% 0230 East Great Lab 2565 7.2% 71% 0200 Grimsby Doncaster Lab 14024 33.1% 72% 0300 North Stoke-on-Tre Lab 2359 5.7% 72% 0500 nt North Kingston Lab 10396 28.4% 73% 0300 upon Hull East 6. FIVE CABINET MINISTERS TO WATCH Candidate Constituency Maj Maj % Estimated ETA Leave vote (GMT) in 2016 Boris Uxbridge and 5034 10.8% 56% 0430 Johnson South Ruislip Dominic Esher and 23298 38.9% 42% 0300 Raab Walton Robert South 2464 4.8% 52% 0400 Buckland Swindon Theresa Chipping 353 0.6% 41% 0530 Villiers Barnet Alister Dumfries and 5643 10.9% 45% 0500 Jack Galloway 7. TEN SEATS THAT CONSERVATIVES COULD TAKE FROM LABOUR, INDICATING A LANDSLIDE Constituency Held Maj Maj % Estimated ETA (GMT) by Leave vote in 2016 West Bromwich Lab 7713 19.7% 68% 0200 East Leigh Lab 9554 20.4% 63% 0200 Ynys Môn Lab 5259 14.1% 51% 0300 Rother Valley Lab 3882 7.8% 67% 0400 Hyndburn Lab 5815 12.9% 66% 0300 Wolverhampton Lab 4587 12.6% 68% 0200 North East West Bromwich Lab 4460 12.4% 69% 0200 West Bury South Lab 5965 11.7% 55% 0200 Stoke-on-Tren Lab 3897 11.8% 65% 0500 t Central Clwyd South Lab 4356 11.6% 60% 0200 (Reporting by Alistair Smout; editing by Guy Faulconbridge and Angus MacSwan)