Clearly, there would be challenges. We do have close intelligence relationships with the United States, a Pacific power, with Australia and New Zealand, Pacific powers. The challenges arise when it comes to the countries I mentioned originally—Japan, Korea, Singapore—and I suspect we would treat such nations much as NATO nations are excluded from some of the intelligence that Britain and Canada receive from the United States: we get some of it that others don't.
There were German and Dutch officers in Afghanistan who complained bitterly about what they saw as a conspiracy, that Canadians got more intelligence from the Americans than they did. It's tough in an alliance, because you trust some people more than others, necessarily.