When the Second World War broke out , Rees returned to the United Kingdom from the Bahamas and once again joined the RAF , he relinquished his rank of group captain in January 1941 at his own request and was granted the rank of wing commander .
When the Second World War broke out , Rees returned to the United Kingdom from the Bahamas and once again joined the RAF . 
 He relinquished his rank of group captain in January 1941 at his own request and was granted the rank of wing commander .