The reason you haven't got atracking number yet and other people have, is that you probably ordered something else with the macbook, I ordered the USB-c adaptor. If you do then the order gets merged in th UK, then you will get the tracking number once the order has been merged. It is probably quicker to order nothing else with the macbook, so it comes direct via UPS from China.
Ah,could be, but I only ordered AppleCare which I didn't think was something physically delivered. I thought it was 'auto-enrol'.