I got nothing at all when I was a first aider. It was one of the reasons I didn't renew my certificate. I dealt with a few horrible incidents and didn't get any thanks let along any financial thanks. A colleague of mine dealt with a particularly horrible incident and her clothes were SOAKED with blood and vomit. She obviously couldn't travel home on the train like that so the company eventually gave her some money to buy clothes during her lunch break, but they were not happy about it.