"Wrens Overhaul Warships Guns. 16 March 1943, Liverpool, Ordinance work Is Yet Another Job Taken Over by the Members of the Wrns To Release More Men For the Sea. After Taking a Course on This Very Important Subject These Girls, Now Qualified Ordinance Wrens, Board Hm Ships on Arrival To Strip Down the Guns, Clean Them and To Carry Out Adjustments." Ordinance artificer testing a gun after Wrens had completed its overhaul.