Change of subject,dockyard sayings,ask any ex yard person,"about the term "rabbit "and I bet all will say it was some small job /article made or performed in yard time,using 'liberated 'material .
In fact the term "rabbit"came from way back ,most yard employes ,apart from skilled men,shipwrights ECT ,were payed on the 'job and finish'system part time only.so cash was hard to come by,(nothing changes).at that time st Mary's island was virgin scrub land,lnfested with rabbits,so catching them in dockyard time was a fair way of subsiding wages/family food supply ,being caught of said deceased bunny on leaving the yard was considerd a sackable offence.so over the years any illegal work / item became known as a "rabbit".
I knew a chippy who during ww2 made a good living manufacturing copper fire guards from shimm sheets,we had a engine fitter who produced beautiful cigarette. Lighters from brass ,plus beautifly made bags &a zip up hold alls from the sail makers,