The British Olympic Association (BOA) insists it is satisfied with security measures for Athens despite growing concern over terrorism.
Greek special forces are taking part in security exercises for the Games
Olympic swimming legend Mark Spitz suggested the US team could withdraw from the Games because of safety fears, but the BOA remains optimistic.
"The security of our athletes remains, our highest priority," BOA spokesman Philip Pope told BBC Radio Five Live.
"We are very confident and comfortable with the security provisions outlined."
Greek organisers have laid plans for a far greater level of security in Athens compared to that at the Sydney Games four years ago.
More than 45,000 guards will be on duty and the International Olympic Committee has also taken out insurance for the event.
"We get very, very good information from the Greek organising committee and
their partners," added Pope.
"They have outlined the security provisions for the Great Britain team and we
remain exceptionally confident that those provisions are the best they can be."