Deductions & credits

Well, more specifically, the club i mostly work with hire me from my employer. So i am not an employee of the club i travel to, but they are paying for my services through my employer. Does that make a difference? My home is also about 2 miles from the head office of my employer, so what you are saying, would suggest that it would make sense for me to that office every day and then onto the fields i coach at which are about 10 miles away as i could then claim that 10 mile journey, whereas if i go straight there from home then i can't?