i know this is late. but the main point here is that you were working "at height" and it seems to me that the steps/stand you were using had no safety rail(s) this is known as edge safety, and any working platform should have at least 2 sides protected (if possible).
your employer was in breach of the "workplace, (health, safety & welfare) regulations. and the "working at height regs", amongst others. had you been in a union with a good H&S rep around, your case would have been a lot simpler.
hope your elbow is ok now.