In a statement announcing the change, World Aquatics said: “Following a decision of the World Aquatics Bureau, and in consultation with the Aquatics Integrity Unit (AQIU) and the World Aquatics Athletes’ Committee, the Guidelines for Athlete Participation in Aquatics Events During a Period of Political Conflict will no longer apply to senior athletes with Belarusian or Russian sport nationality.

“Senior athletes with Belarusian or Russian sport nationality will be permitted to compete in World Aquatics events in the same way as their counterparts representing other sport nationalities, with their respective uniforms, flags and anthems.”

Athletes from the two countries will only be permitted to compete once they have successfully passed at least four successive anti-doping controls and completed background checks with the AQIU.

The tests will be carried out in partnership with the International Testing Agency (ITA).

The move by World Aquatics follows that of the International Paralympic Committee, which admitted Russian and Belarusian athletes under their national flag at the recent Games in Milan-Cortina.

Fifa president Gianni Infantino suggested in February that world football’s governing body will look at lifting a ban on Russia, a move called “irresponsible” and “infantile” by Ukraine sports minister Matvii Bidnyi.