Labour’s acting leader has written to David Cameron calling for compensation from the French government for UK people affected by the Calais crisis.

Harriet Harman said people and businesses should not bear the cost for “border security failures”.

But Downing Street said pointing the finger of blame was not the right way to find a solution.

Calais migrants are making nightly bids to cross the Channel. The UK and France have pledged to tackle the issue.

Cameron has already offered extra sniffer dogs and fencing for Calais.

Eurotunnel and ferry services were running to schedule on Saturday evening after delays earlier.

Operation Stack, under which lorries queue on the M20 in Kent owing to cross-Channel delays, had been stood down, Kent Police said, and the motorway is open in both directions.