Hey there, I work for them and its very true, they are not the best co to work. However, it is very good money compared to other airlines and you get good and bad days. In addition they do offer a permanent contract.
If you need to contact them you need to ask directory enq and ask for:
bmi Training Centre
Stockley Close
I will say that we have the best bunch of crew in the industry. We always have fab days and just get on with it.
Good luck with the interview day