Geez, you'd be a hit in Aberdeen City Council, delph ;) ;)
Bah, ACC wouldn't hire me, they'd just get me in as an extremely overpriced consultant ;)
I was actually reading the other day about how much money is wasted in the UK through councils making highly paid people redundant - only to hire the same people back as consultants!
Seriously though, don't brush up too much on Business English. I did a degree in Management (joint undergrad with Law) and I rue the fact that I taught Mickey Mouse stuff. Business pros need tailor-made lessons. Should you get contracts with them, customise your lessons to their requirements and just make out that you covered the haphazard crap that some books demand.
I actually found a fantastic book - Business English Handbook (advanced) by Paul Emmerson, published by Macmillian. It's an absolutely spot on, brilliant book - I'd go so far and say that it was equal to Murphy in terms of being definitive.
But of course - if you turn up to teach some high powered, demanding Business guy, only to be caught with your lack of knowledge of English grammar, you can forget it.