Hi, while I personaly have no first hand experience of it, I do recall reading a number of people posting that it has been tried and confirmed will not work.

Now I've no idea if you are married etc, or have any immediate family in the BAEC etc, however what I also recall some people suggesting is having one person 'living' in each country, with each corresponding credit card account in the name of the respective person and linked to their BAEC account (which is in the same country as the card).

Then the other person is just set-up as an additional cardholdder on the credit card account only. And vice-versa if required.

Keep in mind both credit cards will also, strictly speaking, probably have firm residency requirements.