The British Olympic Association says it is “doing everything possible to minimize any risk to the people of Japan” before the Olympics in Tokyo.
Tokyo remains under a state of emergency in a rise in Covid-19 cases, with the start of the Olympics just over six weeks away.
The BOA aims to have its delegation fully vaccinated before the Games.
By 8 June, only 14% of the traveling delegation had not yet received a vaccine.
BOA Chairman Sir Hugh Robertson has written to Tokyo Organization Committee President Seiko Hashimoto to outline how test measures for the Team GB delegation go beyond the requirements of the Games ‘playbooks’.
The entire delegation will have PCR coronavirus tests 14 days before departure and regular lateral flow tests after.
It then has two more PCR tests within 96 hours before the trip before a final test on the day of departure.
In a statement, BOA CEO Andy Anson said: “It is our priority to protect not only the health and wider delegation of our athletes, but our hosts in Tokyo.
“Our conditions in Japan are incredibly important to us, and we will do nothing to endanger them to the extent that we go beyond the requirements of the playbook with our test and isolation protocols.”
He added: “We are doing everything we can, and more than we need, to ensure that our delegation is Covid free on arrival in Japan.”