Assuming you proceed with the BA program, be aware that the program is different for US residents than for UK residents. The UK program can be more flexible i.e. one-way awards, but the US program can be better value i.e. cheaper awards. Consider carefully what perks are more important to you. As you are coming from the US, I assume you will have a US address you can use to retain status as a US resident with BA. It's all based on the mailing address of your EC account.
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- Bob