British duo Jenna Randall and Olivia Federici have pulled out of the test event after Randall suffered a sprained wrist .
Olivia Federici will compete in the pairs competition at London 2012 .
British duo Jenna Randall and Olivia Federici , who will compete in the pairs competition at London 2012 , have pulled out of the test event after Randall suffered a sprained wrist .