England are one of six teams who have pulled out of the World Men's Squash Team Championships in Cairo because of fears over security.
The Foreign Office consider Egypt to have a "high threat from terrorism".
France, Germany, Finland, Canada and the USA are the others to withdraw from the event, which starts on 12 December.
"The safety of our players and staff remains our only priority and, at this time, we have real concerns," said England Squash chief, Keir Worth.
"Following the release of security plans for the event and subsequently a comprehensive report from independent security advisers, we have concluded that there is an inherent risk that has not been mitigated to an acceptable level.
"We have been through a significant consultation with the players and support staff over recent weeks and we are extremely disappointed to be withdrawing."