BAA, which owns Heathrow Airport, made the following statement:
"Immigration waiting times during peak periods at Heathrow recently have been unacceptable and we have called on the Home Office to address the problem as a matter of urgency.
"There isn't a trade-off between strong border security and a good passenger experience - the Home Office should be delivering both."
Long queues had formed at passport control on Thursday and Friday.
More top news
Chelsea had planned an open top bus tour to show off the Premier League trophy and hope to add the FA Cup in Saturday's final with Arsenal.
"If I could find love with the poem, I'd be very grateful and happy", said Rajinder Tumber.
The venue says it is in contact with promoters about a final decision, following the terror attack at the singer's concert on Monday.