Complex sentence: Labour achieved a swing of just over 3% although its own vote rose by only 0.2%; the Liberal Party won nearly twice as many votes as in 1959, but did so partly by nominating 150 more candidates.
Split into simpler sentences: Labour achieved a swing of just over 3% although its own vote rose by only 0.2%. The Liberal Party won nearly twice as many votes as in 1959, but did so partly by nominating 150 more candidates.