Heathrow has apologised for “unacceptable” flight cancellations, delays and lost baggage which are blighted the return to air travel, but partly blamed other airports and passengers unfamiliar with travelling.
The west London airport said nearly six million passengers travelled through its terminals in June, bringing the total for the year so far to 25 million.
It said the growth in the past four months matches what took place over the past 40 years.
However, the experience for many passengers…