The arrivals begin amid a security snafu

The drive ought to take about an hour.
London's Olympic organizers, London Organising Committee of the Olympic and Paralympic Games, said "the large majority" of bus journeys had gone smoothly, but conceded that "there may have been or journeys taking longer than expected."
Heathrow airport is expecting a record number of passengers on Monday as athletes start to water in to the city for the Olympic Games, which start a week from Friday.


The arrivals start amid a security snafu, as the government prepares to call in three,500 military personnel because the security contractor says it does not expect to have staff in place.
G4S, the contractor, admitted last week that it would not be able to provide over ten,000 security staffers by the time the Olympics start.
The staff were supposed to be doing tasks including venue perimeter security such as manning X-ray machines, searching people, searching vehicles, & operating closed-circuit tv systems, G4S told CNN on Sunday.
Home Secretary Theresa May, who is responsible for domestic security, was called to Parliament to answer questions from lawmakers on Monday after the failure.
They insisted that G4S actually had over twenty,000 accredited security staff, & that until last week it appeared they would have lots of contractors than few.
The Home Office told CNN earlier on Monday that the contractor was suffering from a program issue which meant they could not guarantee who would turn up where, & whether guards had the right training.


The Home Office also said that the additional immigration staff deployed at borders was properly trained, rejecting media reports to the contrary.
Immigration desks will have additional staff, Heathrow said Monday, amid fears of long lines to get in to the country.
Retired border officials & retired police officers are among those being brought in to help immigration staff, the Home Office said.
The airport expects  237,000 people to fly in or out on Monday, about 25% over on a traditional day.
The arrivals include 335 athletes, the airport said in a statement. Athlete arrivals are expected to peak on July 24, with over one,200 competitors due on that day.