The move follows two consultations and will enable drivers using the crossing to pay through a variety of methods including telephone, text message, online, and at retail outlets.

Roads Minister Stephen Hammond said: ‘The Dartford Crossing is vital to the local and national economy and introducing free-flow technology will cut congestion and improve journeys for the thousands of motorists and businesses who use the Crossing every day.

‘We are now able to take forward the legislation to make sure charges will be able to be effectively enforced once free-flow charging at the Crossing is introduced next year.’

Drivers will be encouraged to pay the charge before they use the crossing but will now also be able to pay the standard charge up to midnight on the following day.

The penalty charge for non-payment will be £70, with a reduced rate of £35 if paid within 14 days. If the penalty is not paid within 28 days it would increase to £105.