The UK's biggest airport is struggling to cope with the rebound in air travel and has told airlines to stop selling summer tickets.
Over the summer months, the airport will limit the number of passengers who can leave each day to 100,000, 4,000 less than currently scheduled.
There will be a cap on the number of passengers from now on.
Thousands of UK travellers have been disrupted recently.
Demand for holidays has caused airlines and airports to struggle to find staff. The summer holiday season in the UK begins in a few weeks.
The May chaos was caused by a shortage of airline and airport staff.
The temporary government "amnesty" to the rules on airport slots was put in place to allow airlines to change their summer schedules.
airlines are still planning to operate flights with more passengers than can be processed in an acceptable manner
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