Hi Georgie, I got your pm but thought it might be best to answer here so that other people can see.
An interview with Flair events is a piece of cake. You are invited in as a group and from how I remember feeling (this was about 4 years ago mind you) I didn't have to say or do much.
However, the job is long and strenous and you literally get paid peanuts. You don't really get to watch the bands unless your bar is in a good position and its pretty slave-like. My experience was alright which I think was due to the fact that I worked with my sister and a friend and also because I served Gareth Gates, which was quite entertaining at the time!
If you have free time and want a bit of an experience, go for it. If you want decent pay and a chance to chill out and enjoy yourself then this probaby isn't the job for you. It probably does also depend on the festival also. I worked at V.
Good luck!