When you join, it'll be business on the way out, you'll be met at the terminal and they will process your visa, you'll then be driven to where you will be living. Its a very smooth process (they've had a lot of practice
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Staff travel is ID90 business or economy for flight deck, you can choose what you want via the staff travel website. However if you pay for business and its full you'll be bumped down to economy. You can check the loads though before you decide.