At the Port of Dover in Kent, officials said this morning that cross-Channel ferry operations were operating "as far as possible".
Passengers are being advised to allow extra time for journeys ahead of possible road blockages on the A2 and A20.
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Mixed fortunes across the UK tomorrow. Still breezy across the north.
The Labour leader said socialist politics would not be put "back in a box" as he appeared on stage at the festival.
MPs and Lords have been left unable to access their emails remotely as a result of the attack.