Just remember that Whitworth and Bs torque specs are the easiest in the world.
Simply tighten it up until it strips then back it off half a turn. This is especially true of the little banjo unions that are so popular on fuel and oil lines.
However, before anyone climbs all over me for criticizing the English, they had the decency to fit all their Ferguson tractors and many other machines with SAE bolt heads and threads before shipping them to North America. Decent chaps, all.
Now if anyone fancies a warm beer, I will go to my Lucas refrigerator. Rule Brittania..... dp