Ten bellwether seats to watch on election night

It’s easy to imagine prime ministers on election night, either nervously grinning or groaning in despair when the results for Dartford are announced. In every election since 1964, the London constituency has voted for the party which went on to win nationwide. It, along with nine other constituencies (such as Watford, Reading West and Worcester) are the true bellwether seats, which have predicted the national mood since the 1980s.