Jingoism 

my wanting what is in an article to be properly cited is more a reflection of your attitude than mine
Thats how your attitude looks from aside (no offence):
 The cited reference had a name by which it is easy to google it. So when the ref link to the telegraph was broken, you could have fixed it, like i did. Instead you immediately got rid of the whole (inconvenient?) interesting fact. 
 I've put this fact into the "tank" article long ago, and since than check it once in half a year. And it is either deleted, or is distorted badly. You seem to have the article in your watch list, but do nothing to prevent it. 
Let's make a deal, you will be as careful and watchful to the fact as to any other, and i stop thinking of you as of a jingoist? ;) deal? 84.52.101.196