Number 2 and Number 5 are also unidentified in 54Bty album!
http://www.britishbadgeforum.com/for...php?albumid=98
Number 1 (Northern Ireland District) is said to be a pun on "nest" = NID (French for nest)!
Number 3 looks more like a School Badge
Number 4 NORTHAG is a design based on an ancient battleaxe found during construction in the early 1950s of the Joint HQ at Rheindahlen near Moenchengladbach in West Germany.