After attending HMS Dryad for the Principal Warfare Officer course , Laurence was promoted to lieutenant commander ( 1 March 1985 ) .
After attending HMS Dryad for the Principal Warfare Officer course , Laurence was posted to the frigate HMS Alacrity .
After attending HMS Dryad for the Principal Warfare Officer course , Laurence was promoted to lieutenant commander ( 1 March 1985 ) , and posted to the frigate HMS Alacrity .