Heathrow is operating a revised flight timetable due to poor visibility on the runways today. Approximately 10% of flights are expected to be cancelled. Those after 4pm are most likely to be affected. Click here for updates.
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Largely dry with cloud and some sunny spells this afternoon with light winds.
Dry with sunny spells and light winds.
Union boss says he "deeply regrets" the disruption to people's travel plans after several days of talks failed to break the deadlock.