I was late to an interview once. I could have blamed public transport, but in reality is was poor preparation and planning that caused the issue (forgot to take a map and tried to work on memory). I'm not talking 5 minutes late, I'm talking over 30 minutes late. It's the only time I've ever been late for an interview in my life.

They still gave me the job. I was uneasy about this at the time, but accepted. It was a bad choice, and I was a bad fit. The fact that they brushed off this bad mistake without mentioning it should have been an indicator to me that any amount of sloppy mistakes would be tolerated by their staff. And thus it was proved so.