Olympian Barbara Kendall has slammed Heathrow airport, describing it as a "nightmare."
Kendall, an IOC member, arrived in London three days ago.
She took to Twitter to vent her frustration, tweeting, "Heathrow Airport Immigration is a nightmare!! took me 2 hours to get through and it is not Olympic time yet."
The five-time Olympian is in London ahead of the Olympics, which begin on July 27.
Another notable tweet from @disabilityaid said, "went through terminal 5 Heathrow Airport on Sunday - a nightmare! 4 hour delay at immigration. Avoid Heathrow at all costs!"