If you do a search on bmi you will get lots of info.
I used to work for bmi for about 4 years and left due to various reasons. Some being, hours of work, which are now averaging probably 50-65 per week, no night stops and therefore a drop in salary and just no respect from the company. There are other reasons but these are just a few to mention.
I will say that bmi is not a company to make a career with, but just a stepping stone as many will tell you. An average early is usually from about 6am until 3pm. However, it can be longer due to delays etc. Normally 3 to 5 sectors pers day with an odd 2 sector perhaps once a month. I will say that I enjoyed my time there mainly because of the crew. They are fantastic as you will find out. Money wise- As a new starter you will rpobably earn between £1000-1100 pm and it increases over the years. My normal take home was between £1200-1400.