Well.......technically the 'zombies' in the 28 Days movie weren't zombies, just humans infected with a virus, hence they were no more resistant to damage than your average joe/joan........but the proper zombies who could run were first seen in the Italian horror film- "Zombie Creeping Flesh", that may not be the original name, but that was what it was called when I saw it on video, late 70's / early 80's, it even had a surgon throw a scalpel into a zombie's head!
As for defensible location, I to live in a flat, ground floor, but it's fairly secure & the complex is divided up into groups of 8 or 6, with fire doors separating every 2 flats, so I should be OK.......fingers crossed!
A good machete or wakazashi is good for close action, but I don't own either.......yet,
