Complex sentence: The Dartford Tunnel Act 1967 gave Kent and Essex County Councils authority to change the tolls, and Iin December 1977, the toll was raised from 25p to 35p for cars, 40p to 55p for 2 axle goods vehicles, and 60p to 85p for HGVs.
Split into simpler sentences: The Dartford Tunnel Act 1967 gave Kent and Essex County Councils authority to change the tolls. In December 1977, the toll was raised from 25p to 35p for cars, 40p to 55p for 2 axle goods vehicles, and 60p to 85p for HGVs.